Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e75b05435d1114…

MALICIOUS

PDF

86.4 KB Created: 2021-03-23 07:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 621352742514d252c369c044589f42a0 SHA-1: a11b60ad4a741fa577ed79b0ffbd78eecfe504d2 SHA-256: 69e75b05435d1114cf353d0726996d67b44c5b4139bf72977db6caec20b54746
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/wix?keyword=great+britain+imperialism+in+india PDF link annotation
    • https://nipukidifa.weebly.com/uploads/1/3/0/8/130873732/sevuxoremujatej.pdfIn PDF document text
    • https://barosowuni.weebly.com/uploads/1/3/1/3/131398377/rivalatetimo.pdfIn PDF document text
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/3279011.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/IYEKtih/mizabep.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/oibjeih/dayforce_employee_guide.pdfIn PDF document text
    • https://nidixinaxob.weebly.com/uploads/1/3/0/7/130739699/kujuzovixalezesetos.pdfIn PDF document text
    • https://fudolimag.weebly.com/uploads/1/3/4/5/134586879/tuvezupapobifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423732/normal_60394f7b14c09.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/ojevjcE/soul_stone_simulator_wiki.pdfIn PDF document text
    • https://gevanodapo.weebly.com/uploads/1/3/4/8/134887816/e7db3.pdfIn PDF document text
    • https://lujisitezolip.weebly.com/uploads/1/3/4/1/134109273/bifeweme.pdfIn PDF document text
    • https://tidijesugeji.weebly.com/uploads/1/3/4/7/134764535/f78e3bc4855b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426942/normal_5fe5c661677db.pdfIn PDF document text
    • https://rafomuvufeja.weebly.com/uploads/1/3/1/8/131856077/43fcb3bcbeaa5ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/hallelujah_violin_cello_piano_sheet_music.pdfIn PDF document text
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_d871f74a5c6d4e1283d16e7b1d5e5cc0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bakoloj/73151324708.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/mepivutokexat.pdfIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_7be5696ecd484cf3afd6c6b46f8072d4.pdf?index=trueIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_242285cff1f843289fc22a9a9e99602a.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
    • http://scripts.sil.org/OFLIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 5276 bytes
SHA-256: cf98d9198f5d9ccdefc0c30dcc4f5edd400cc857b3ff0a20f256477af88193e8
font_01_sfnt_off0001012a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012A 6340 bytes
SHA-256: 28a3b00f99b973cd5b25933552320199dcdf55e7eeb17f0bfabfa37e4cc478da
font_02_sfnt_off000110be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BE 11108 bytes
SHA-256: b3129ea0de078a74fede14d0abd143b350bb241a3a9e45bdbd4e130a80416274
font_03_sfnt_off000136d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D4 16036 bytes
SHA-256: bc1c1644e30597ae0beaac312b9749a82b64e26c109397326cdc67fdbaf2fe17

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