Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd160e7417bc7e8d…

MALICIOUS

PDF

69.4 KB Created: 2021-01-16 02:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f96f08dbed9ad4054b946de795f38196 SHA-1: 0719364ed097cc0e35ef9be30b5aebc857eceeb7 SHA-256: cd160e7417bc7e8d75cf50380ec7da6716dee1835c0ae1d6a691af86323f820b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO spamming operation. The primary URL, "https://trafffi.ru/aws?utm_term=solidarity+forever+lyrics+pdf", is designed to mimic a search result, likely to attract unsuspecting users. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs indicate a malicious intent to redirect users to potentially harmful content.

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://trafffi.ru/aws?utm_term=solidarity+forever+lyrics+pdf PDF link annotation
    • https://cdn.sqhk.co/japanakoga/Xiajfgc/37862070913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404741/normal_5fa9ba93d0437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470972/normal_5feaeef0b9fcc.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/zewija.pdfIn PDF document text
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/735febf3fac750.pdfIn PDF document text
    • https://site-1199256.mozfiles.com/files/1199256/lemoxopaxalonunasok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489993/normal_5fbadf9d7d39f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f8c5697ed38a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f8704db3b79d.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/nepawigexa/bojanusisik.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/98866042505.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/genting_hong_kong_annual_report_2018.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 1

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_off0000d1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B8 5416 bytes
SHA-256: 9b35c6b888d7f391ce9db4eca8e6c25cc2408d323ab8fab1e04cd94cc093a471
font_01_sfnt_off0000e442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE442 11248 bytes
SHA-256: be236f1377e12ce4b804b01ee404ab24f5168176ed0528e26530f9642a8062db

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