Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe0b711c1c8b27c…

MALICIOUS

PDF

81.8 KB Created: 2020-12-30 13:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0739c2bf28c90ff2a12c4d743660bece SHA-1: dda077dfd0acd532fc4b46ede001da103cae5400 SHA-256: fbe0b711c1c8b27c13342bf70e0d0b78f1a610cac17cbdefa177bd02d398dba3
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 numerous external links, a common tactic for link farms or phishing campaigns. The embedded URL and document body suggest a lure related to downloading a menstrual calendar for Android, which is likely a pretext for directing users to a malicious website. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://trafffi.ru/strik?utm_term=descargar+mi+calendario+menstrual+para+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443610/normal_5fd77c95d575f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476001/normal_5fcedf385ccf1.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/d6b21.pdfIn PDF document text
    • https://wepifoxo.weebly.com/uploads/1/3/1/4/131437594/6d064c9e5a0f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5fe86cf657bc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_5fbd8f64f3b98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_5fdda3cbe85ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500669/normal_5fd72cb0d5253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445101/normal_5fa910c702b7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387718/normal_5fc8c0d1bdbb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f8ab2e8b1e7b.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/45ac1efd-2e09-4ba6-8b5d-091cb5760045/10870336364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2454c5c8-1401-4257-ba9a-858037c4cc03/xerosupeboxedewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4265df7c-de66-408b-9992-337769123cb1/warazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19231c1-24c6-4eed-9f53-40007325d89d/fapobowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bacb0cc3-bb94-4e64-9306-4f35109c8738/73586057436.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE656 5392 bytes
SHA-256: 7889ddd2a408e59eea2116471146b051e25df2fe6208ccc4a677300a132a6bbc
font_01_sfnt_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 12860 bytes
SHA-256: 8933f25ff491d79405cf4ae4dc023641be9b484c776aac863a9906ec5d2658a0
font_02_sfnt_off000122f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F3 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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