Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af1cca9209f7915…

MALICIOUS

PDF

75.2 KB Created: 2021-05-29 06:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c76274af662e27cfda0fb2f7913cf218 SHA-1: 6ddaa88094b8768c94bfdfba1e7659f2a420a874 SHA-256: 7af1cca9209f7915f279e113621880dc5316bfbc1fa4134b152898d610ad6b1d
156 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 0.9997

Heuristics 5

  • 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.
  • 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://maypoin.ru/123?utm_term=order+of+operations+decimals+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450424/normal_605058622ffcf.pdfIn PDF document text
    • https://nutumavu.weebly.com/uploads/1/3/5/4/135400781/a259a15d8c3c91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5fe126e073dd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469634/normal_6003bd93f2c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_5fe64f0cdef54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393908/normal_60046bf1841f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421342/normal_6006310a43569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_6041abd1f155e.pdfIn PDF document text
    • https://kanexunife.weebly.com/uploads/1/3/2/6/132681916/0c88d84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453342/normal_5fcd344f31da1.pdfIn PDF document text
    • https://zigiruma.weebly.com/uploads/1/3/7/5/137517675/baveju.pdfIn PDF document text
    • https://duvigenusidila.weebly.com/uploads/1/3/4/7/134736387/1c664e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489259/normal_6060fbc611e7a.pdfIn PDF document text
    • https://xemudimiju.weebly.com/uploads/1/3/4/8/134861016/b712b7c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_6015857011573.pdfIn PDF document text
    • https://rinosebamajipem.weebly.com/uploads/1/3/4/6/134694393/jewezalenaj_boril.pdfIn PDF document text
    • https://zugatesek.weebly.com/uploads/1/3/6/0/136082504/4147826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475859/normal_6057fe5a98b85.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/4cbb534e-392f-43c8-8890-e26c4a41e6db/lidupixoduviratubazozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d121ae-a358-478b-ae48-02c02da6e824/11286106738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4209f455-95aa-4277-8781-a836f69b419f/tivupufokoluxukuvuvepi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE847 5580 bytes
SHA-256: c58279c59f8f7ccc93ca267ae9fe6aa206a79bd1888bc27b0b03adc84ec0b4bf
font_01_sfnt_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 10572 bytes
SHA-256: 67cf24bf40dd9d88c1111ea6bd0a1addf0b55b6d6acf4ebdb8c1dfa22db26515

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