Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd7fcbb313c6601…

MALICIOUS

PDF

71.9 KB Created: 2021-06-10 18:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c1c6fa3ed14a2664152e701437f1f4e8 SHA-1: ce340f64c4aa67e0f466a882005c714097188ed2 SHA-256: abd7fcbb313c6601b2305eabed26a971c4aa9a5defd783a086e4fe26d31366a4
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a site offering a 'free download', a common lure for phishing attacks. The PDF structure also suggests it's part of a link farm, likely designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://allytemp.ru/pbw?utm_term=the+whole+earth+catalog+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411696/normal_605dc92a0c1e0.pdfIn PDF document text
    • https://xizotikozuza.weebly.com/uploads/1/3/4/5/134587863/sawikakavivenulamose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425772/normal_606de0504503d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_603cf0894d746.pdfIn PDF document text
    • https://kavakisin.weebly.com/uploads/1/3/0/9/130969045/6fb974fc2d11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425929/normal_6003092545959.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fca030e217b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451356/normal_5feb57cc94217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502817/normal_6024fd47a0854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_604b0cd04a0b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/727debad-943c-4be7-8b59-031f34ef26bb/69449757192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/919bdfc1-e1ce-4cbc-9007-a1f9aeda61dd/what_does_a_b1_service_include.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b696c4-b73a-4bb8-b7b4-44bd6efff835/the_7_spiritual_laws_of_success_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d333ca90-f5ce-4d8f-887a-254459714d74/api_570_piping_inspection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1033904a-0867-4f4c-9c55-eaa4d19f8bdd/how_much_does_a_graphic_designer_get_paid_an_hour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba9084d-8cb0-4d66-adcb-4d7b19cbb654/faferovepuwineladetepe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF25 5020 bytes
SHA-256: aa3038369775524ddab58a92d6b5681771ecefd340ab76047d3a7a6c535d6a58
font_01_sfnt_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 10360 bytes
SHA-256: 9180432252437ce4404e88eabd0f246897a48a060efeb820f58d3a2c46d513af
font_02_sfnt_off000103b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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