Malicious PDF — malware analysis report

Static analysis result for SHA-256 679ef030a4456fd0…

MALICIOUS

PDF

66.3 KB Created: 2020-11-16 12:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 61d2f6bdafac4ad23a82ab77fef99529 SHA-1: 1649790c1cc5f25f280c3e3fb6ea8f835217937d SHA-256: 679ef030a4456fd027c185fc658e1478d22df01bdd4abdee177455140ac2b8a5
134 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. It uses an urgency-based lure. 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 0.9998

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffine.ru/123?utm_term=failure+to+appear+in+court+felony PDF link annotation
    • https://vurazomuloja.weebly.com/uploads/1/3/4/3/134322302/jevakulu-taruz-gotomoveserose-gavabupoxip.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/vubejux.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/7240363.pdfIn PDF document text
    • https://tusemebi.weebly.com/uploads/1/3/4/3/134316443/sinizaxuxut.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/6585118.pdfIn PDF document text
    • https://kukajuma.weebly.com/uploads/1/3/4/3/134380089/ratonuxujox.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/dibimobotipibixo.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/ab3a255eda76954.pdfIn PDF document text
    • https://jokineviraxara.weebly.com/uploads/1/3/4/2/134265776/dofimeral.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/sevoga/85218753618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7737b1d7-1937-4acd-8d1c-5777240f2751/45244912982.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/76812166735.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/aroma_rice_cooker_recipes_chicken.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/86542407375.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_off0000c71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71D 4888 bytes
SHA-256: 3717a87cb4bf103faa14784b88e6687a225ce05681e9c59b0cd591a432bcce83
font_01_sfnt_off0000d7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E0 10632 bytes
SHA-256: 9fc382adeb1978e830ce73fbc095e7913f295a570874d9ab0bf0da0a55f74ad1

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