Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d030b84d9b629e…

MALICIOUS

PDF

97.7 KB Created: 2021-03-22 12:21:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 93d83ec35c4a18fdac5926e19d4e3eea SHA-1: ed3e36ed51754c6ebbec51dadf3a7ee89c548a4a SHA-256: f0d030b84d9b629e8407c9255c159d421bbe4e041855dbe25c6c070bdea73225
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/aws?utm_term=samsung+core+prime+price+in+pakistan+whatmobile PDF link annotation
    • http://iglivesupportteam.com/pujiminebagazoscov46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_6049eb7f12ade.pdfIn PDF document text
    • http://italywow.info/74211701114x6kyw.pdfIn PDF document text
    • http://max-lifting.store/gapizurutafesqu09j.pdfIn PDF document text
    • http://mysteps.online/theory_of_relativity_musical_wiki26oyy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479938/normal_5fe7767df03a6.pdfIn PDF document text
    • https://tenipimip.weebly.com/uploads/1/3/4/0/134042327/roxigedipipe.pdfIn PDF document text
    • https://xavodumofas.weebly.com/uploads/1/3/4/9/134901052/8551497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_603b6f7eee8ed.pdfIn PDF document text
    • https://gumakini.weebly.com/uploads/1/3/1/4/131414358/9369721.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/78100503-536c-4ab3-98e8-fe3c513c3fae/46305195332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4805ff62-d130-49f6-bcef-f50ca7ff0ef7/george_foreman_grill_medium_rare_burger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d92968-c70e-447f-9c52-701aad9e2a0d/dungeons_and_dragons_basic_set_1981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ced5d3-aedd-4658-9d3b-a9a027a840a5/vuwoxomofefitofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceddee21-a70b-4558-8056-d6b83469e7b3/schwinn_270_bluetooth_pairing_code.pdfIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_131dd988f10941409f62efcedcb05b30.pdf?index=trueIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_923b9b18912d48399e351f205e7a5a11.pdf?index=trueIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_f271834c65ce468398981d737f505cb8.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BD 5748 bytes
SHA-256: b90d95aad89dcbf9d1b5fcb74fb8f9b5c00f83f88a5edc7fe726daadc52e28e0
font_01_sfnt_off00010834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 2196 bytes
SHA-256: a5067b6b273d805be0a2cb16434a380324c83a7396b9aad2763f2bcd44f3bd35
font_02_sfnt_off000111c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C6 3852 bytes
SHA-256: fb9a9d6d956734aafa617145bc4294d680f35380ebfe4cccb0c41768ced05ec5
font_03_sfnt_off00011d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D85 2800 bytes
SHA-256: fd2c589d7f1fdc6b45908b7e6090fac7e9d49628e1ec9941768bd75dc132fb9d
font_04_sfnt_off00012836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12836 13448 bytes
SHA-256: b051a8538582de8487e6242be8606a66f1abc628d12a83a0be4ec7414351a267
font_05_sfnt_off000154dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154DC 16912 bytes
SHA-256: ef34d016c4ef9b170588d880f2b63f38adfae74d5f808537b1ab62cecc7276f9
font_06_sfnt_off00016d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D48 2416 bytes
SHA-256: 606572454e85aeb57f6656cf48871ed3cc3cba181eae4edc1c6e97d9fefe09d3

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