Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78ae2d31ce34a98…

MALICIOUS

PDF

77.1 KB Created: 2021-05-31 03:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5ea2531326f2a70a37b99058a4347157 SHA-1: 5ad7a8609d8dacd78ef97dea8d017a5cda910850 SHA-256: c78ae2d31ce34a9881eaa33789d7472ecd49593720f89ed488a84174f691582d
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 0.9993

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://zajinet.ru/strik?utm_term=fresnel%2527s+biprism+theory+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401982/normal_606a0a65e74de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488809/normal_5fd3af77c0ad8.pdfIn PDF document text
    • https://mevenuma.weebly.com/uploads/1/3/4/3/134380719/peror.pdfIn PDF document text
    • https://weluperexofabed.weebly.com/uploads/1/3/5/3/135382791/1976056.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481422/normal_60089ce83fd6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488329/normal_601baab16e215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413967/normal_5fe26b66c1d6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480582/normal_5fe4c4d90cf9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530070/normal_6014177b95a44.pdfIn PDF document text
    • https://nurerimufiwovu.weebly.com/uploads/1/3/4/3/134394752/c210b6ff01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372985/normal_6006cef073fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_6065fdc7e1c86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423195/normal_5fcf851b59d25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_605d6fbd1b748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488837/normal_605422df2378a.pdfIn PDF document text
    • https://resevaguwitim.weebly.com/uploads/1/3/5/2/135298688/guduzapexusudatomisa.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/de7cf388-c245-4bdf-afcb-9e804bcc72d1/71307727876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ed057e-cc0d-45ff-8bf2-3f2ab2fcf0b6/48556371786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db1fbf4-8159-43f3-b350-78ca90591ab2/33888233232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef6c8d6-d798-45a6-8185-4a8cb82a06c9/gunuserokubefifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb32a579-1f7d-445b-bbb1-14054075cae3/whirlpool_duet_washer_error_code_f01.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48654ada-3477-47d8-b4e3-d16623e137b3/58598714426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba73c72e-59a7-4eb3-9d45-096b8168557f/gexikunebozubuvosuvador.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_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 5300 bytes
SHA-256: 7e7441a7968e2368608f037a2b1814b9340f4d33fdd526b0745b126fa7a696c6
font_01_sfnt_off00010178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10178 11648 bytes
SHA-256: 4af0ab667063f2a7e519dee7b025b60ed92930deb6a3d1948e272f315c967527

Open this report in the interactive analyzer, or submit your own file for analysis.