Malicious PDF — malware analysis report

Static analysis result for SHA-256 3217348258d487a5…

MALICIOUS

PDF

77.1 KB Created: 2021-05-04 02:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7a4ded90e84f1c33d62393ea88a3ed57 SHA-1: de93d68576a3df0144dda182c9d9d38f84d04fc4 SHA-256: 3217348258d487a591200df81d4133a4e31b092e7232b6c9626f9179d6b3c1ed
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 0.9998

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://maypoin.ru/strik?utm_term=black+and+decker+cordless+edger+trimmer+18v PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486537/normal_6034c19c7109a.pdfIn PDF document text
    • https://taxurazuzar.weebly.com/uploads/1/3/4/0/134042721/ba10d7c38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420235/normal_5fc777c9665d1.pdfIn PDF document text
    • https://ranilabat.weebly.com/uploads/1/3/5/9/135999147/nisirunegeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_601af1f0e1188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474220/normal_6060fbf35646d.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/jonora/rural_development_mcq_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5263a1e1-80d6-41e0-86bc-28e9c7c121c5/rarurelafopesetapudenuwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/jewupakiguvifabikusuze.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/rukozolovedipi.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/fubutude.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/what_ply_is_caron_simply_soft_yarn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177318ee-caa2-472c-b73e-73f9ff2f95e4/boxoporid.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/salexudikepodif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8bbdb0-86a7-4ec9-94e3-1f79ff115094/doubt_by_john_patrick_shanley_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/9959201893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42494ef1-e397-48e7-90da-00267735b0b6/zepufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3026cec8-95ab-41c9-88ae-ec49209d0ce7/38114192187.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/idsa_guidelines_pneumonia_hcap.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 5680 bytes
SHA-256: 3811852d89cddfcf7354ddd7d499f0fc62240a353a406cd66917525f362d51c4
font_01_sfnt_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 11016 bytes
SHA-256: 115d83118e467a1566af3fdaf33b14cf166b696ea4a09b23786b8f89c44d82bb
font_02_sfnt_off000111a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 16192 bytes
SHA-256: 9c7926b8929b88a1dffb52ec04bcfb477868fd459509337312ce674bafabbb6a

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