Malicious PDF — malware analysis report

Static analysis result for SHA-256 344afacacbd094fb…

MALICIOUS

PDF

97.9 KB Created: 2021-06-12 05:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2b725f80ad6a7e5cd5f61f9da435a6dd SHA-1: 15f2aaef4631b469ed640259eecf08e19819d022 SHA-256: 344afacacbd094fb9abd0978618776af2004bd4d3ffb609191d0b4d933504ee7
186 Risk Score

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 0.9997

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://jumiwimov.ru/123?utm_term=wow+classic+night+elf+druid+leveling+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5fdb81d41cfeb.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4483361/normal_60b2f05982940.pdfIn PDF document text
    • https://gabanifuvumot.weebly.com/uploads/1/3/4/5/134588994/3127030.pdfIn PDF document text
    • https://dewotime.weebly.com/uploads/1/3/1/6/131606762/4ea00b381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447906/normal_60636aaf63194.pdfIn PDF document text
    • https://mogeletonedilo.weebly.com/uploads/1/3/1/4/131482944/ragolavikidajo-jamejiduxawofu-terizi-zukuvitizojo.pdfIn PDF document text
    • https://nenopejir.weebly.com/uploads/1/3/4/6/134603535/dikuxekevitefa_rasowudoteno.pdfIn PDF document text
    • https://vavivaso.weebly.com/uploads/1/3/0/8/130873957/1622342.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496580/normal_5ff7ac4f59b87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410194/normal_5fcc8fee7d072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_5fd674fba9cec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba49d05-cc40-45a7-8b93-6b9495e8c64d/54945266896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ebe0d46-9019-4284-9416-c6331ee8a35c/how_to_connect_afterglow_lvl_3_wired_headset_to_xbox_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b53a9d5-af89-4457-9b47-c371a5e14ec4/wanuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e19977ac-3b6c-4cd4-b0fb-95e1b4033019/my_hp_4500_printer_is_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65dfa55-63ba-4c4b-a787-d206e8bf3fda/comprehensive_model_of_strategic_management_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e4bf30-a785-4ca0-8a6d-6faab26146cb/microsoft_office_desktop_shortcuts_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceefb580-24b1-48c9-b230-ba64cb4d2ec9/dovafafefejapabewenokib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e0f224-1b40-4281-9577-38e47a91983c/39062769553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37280c24-1061-420d-98e8-1f209628975d/42271907490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75204e8c-ffde-425f-b175-595f7f1b2ad1/datanitapufapi.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F20 5448 bytes
SHA-256: 359f83e8079cd46478d2d0eb1a369c5ce42f5cbfc17f985637b813fc3e835f61
font_01_sfnt_off000151c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151C1 11832 bytes
SHA-256: 6a7c93608143637640df487a93eb1873d0b8cc0b46d9d53e9e0a589165d4dc8b