Malicious PDF — malware analysis report

Static analysis result for SHA-256 279803552f88f643…

MALICIOUS

PDF

72.7 KB Created: 2021-03-04 08:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6620dae09ccaf617a62d859bdde6b215 SHA-1: 913855b279a92829bfedd304eb5475c819c7f5f9 SHA-256: 279803552f88f6437d41036acfa98183b56b1bb00a4445953e685d279e132db8
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains numerous embedded URLs, including one that appears to be a lure for "John Deere 12v side by side" search results, suggesting a phishing attempt. The presence of external URIs and a link farm on disposable hosting further supports a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://gimoguvi.ru/award?keyword=john+deere+12v+side+by+side PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368237/normal_5ff7a2d9f38ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417214/normal_603e9a9e6e27f.pdfIn PDF document text
    • http://opssmall.space/brace_yourself_meme_template2le6g.pdfIn PDF document text
    • http://profapp.pro/29806908162ywlxu.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/iCjcIoJ/where_to_buy_cross_stitch_fabric_in_canada.pdfIn PDF document text
    • https://vurinilobato.weebly.com/uploads/1/3/1/4/131454355/xexaxa_domegajupajije_kuvudijo_viwusesuniva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_600a8f3b03fbe.pdfIn PDF document text
    • https://jizufuvarax.weebly.com/uploads/1/3/1/1/131164460/popezizol.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/naxuzunufalimuvutawe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382613/normal_5ffe64926d72e.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/hifjgZT/59475820768.pdfIn PDF document text
    • https://wabegikabakupoz.weebly.com/uploads/1/3/4/6/134668284/5ee314e8e7518b5.pdfIn PDF document text
    • http://magic-spring.com/fovubokojabijeduzse18w.pdfIn PDF document text
    • http://tramlaweq.online/285220174487ntle.pdfIn PDF document text
    • https://cdn.sqhk.co/jekenilegefe/Nxbjaig/3011452902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420451/normal_602025b237043.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE010 5144 bytes
SHA-256: e044c4ac9bd880e2514edb56b8a375cbe463c0f9e3ed0b8519390aefc9ea41bf
font_01_sfnt_off0000f198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 10644 bytes
SHA-256: 1f610860eb65b3027f143c56ff3178374cc6b029fbd719a3a4cf89e262787058

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