Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad03dd8cee76f54…

MALICIOUS

PDF

128.6 KB Created: 2021-03-20 23:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c40358038fdacf5b343a8d6c576017f6 SHA-1: dff0effbcced7ca941826a53f5bd8a2cf9d6e21f SHA-256: bad03dd8cee76f54a2b69a7e4bdf9bef38c18ec5a5dcca47e33f752bc2981b2c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to disposable hosting services. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/award?keyword=marathi+aarti+sangrah+gita+press+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420237/normal_5fe5df206b3d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466662/normal_601ceb62730d9.pdfIn PDF document text
    • https://gikotaduxig.weebly.com/uploads/1/3/1/4/131454052/8830180.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/fjgjcgh/71393952293.pdfIn PDF document text
    • https://paxobafu.weebly.com/uploads/1/3/4/6/134697986/8862149.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/definisi_animisme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449406/normal_60365e548ab25.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/ijcjghh/27467302727.pdfIn PDF document text
    • https://dibegojiziwezed.weebly.com/uploads/1/3/0/7/130739363/28582.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/wademudazo.pdfIn PDF document text
    • https://cdn.sqhk.co/lojulifuvuxu/jjjbgfi/bosidijetufewugak.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/81516901754.pdfIn PDF document text
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/mizopabamaxozesanule.pdfIn PDF document text
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/e9fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487200/normal_602722f58f451.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/aW5zijb/duresifujosodudapuvamuxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_786bee67919b4b3782a971445637c7ed.pdf?index=trueIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_891c412029a84dd8bdd982fd78cfea10.pdf?index=trueIn PDF document text
    • http://nejesezape.myartsonline.com/south_indian_vegetarian_dinner_menu_list.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_a0c74851517e4bb0983bdc08f3354b0a.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F3 6704 bytes
SHA-256: bffe151ce696c4bb91d0f74b97322a49f46144c007400576a595c1903e1fadc4
font_01_sfnt_off0001177e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177E 5280 bytes
SHA-256: 543cb99d334964d506bb86551adbd1e57fef52ab757a0b8c8635d997385e6f46
font_02_sfnt_off000129a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A1 4952 bytes
SHA-256: 3cc31bf52482b7d6bfc400fb3476ac5be13e391b95acacd57efc543620badf9a
font_03_sfnt_off00013a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6B 20952 bytes
SHA-256: 31c9189b02643b1f86ee8b2c8996e4152ed68ef9d17a74cae5a23ab93c0df31b
font_04_sfnt_off00015a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A8C 6644 bytes
SHA-256: 411031f31f5247a4f89cfae499af3788b565f7ee843227c48910af7f4136f68a
font_05_sfnt_off00017049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17049 15104 bytes
SHA-256: 92c19155026e5ef7f5c1003314aacc8d272d837dc47cfbc582f42036af6bcd4e
font_06_sfnt_off0001a139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A139 17448 bytes
SHA-256: 4342a61222ee59d0f654f6cf623d0057e35d2865cfa3403ceb78174f0a603a54
font_07_sfnt_off0001bb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB5F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
font_08_sfnt_off0001c960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C960 6828 bytes
SHA-256: ed32f1930fc64bb46970c84646f6418a054b779134ad71d26323edf8862cde3a
font_09_sfnt_off0001e0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0D0 6108 bytes
SHA-256: 31cb5846bafd0ba01ee536c1fbbda6556ecf6149762088ada0284b513d19daf6

Open this report in the interactive analyzer, or submit your own file for analysis.