Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ca8baf424033fe…

MALICIOUS

PDF

69.5 KB Created: 2020-12-09 09:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8a0500e56fb113a99f8aa0eff245f4fa SHA-1: 53a04e833e6a85cab13000dd3afe62f1157a4a8b SHA-256: 80ca8baf424033fe3dcc647aaf9923a8bc6deddf71af16cff4c440379a8da5db
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/strik?utm_term=christine+daae+costume+diy PDF link annotation
    • https://biwulijek.weebly.com/uploads/1/3/4/5/134500127/5e71483316.pdfIn PDF document text
    • https://sudikejejipow.weebly.com/uploads/1/3/4/8/134879182/guwosi-pasovalimi-lirakavi-dipurofilibap.pdfIn PDF document text
    • https://tufiganifipira.weebly.com/uploads/1/3/4/3/134310976/kibukuvigalonano.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/zaramixokisugig.pdfIn PDF document text
    • https://ridogorizaloliv.weebly.com/uploads/1/3/4/5/134527302/5848051.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/b48a60d1.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lafomu-fowesutom-dabikituduxun.pdfIn PDF document text
    • https://mimejimewib.weebly.com/uploads/1/3/4/6/134608848/535cf44d5fd.pdfIn PDF document text
    • https://mawoluji.weebly.com/uploads/1/3/4/2/134265904/xuzojozugo-balexifimoko.pdfIn PDF document text
    • https://zuriloteva.weebly.com/uploads/1/3/4/6/134623588/3430775.pdfIn PDF document text
    • https://kadezejuvi.weebly.com/uploads/1/3/4/6/134603763/6f91345ad7b293.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/1816054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_5fa90da7c2ec6.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/b13d6187-de3a-4d8b-bb00-5b3c19e36e06/convert_presentation_to_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff5a60fa-38d8-436e-a4a5-8009463a9d6f/29415817340.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC616 2888 bytes
SHA-256: 002800a4821813a929c899fd6bd0ba57a8f832249628ea1c7521c704aaa157d4
font_01_sfnt_off0000d05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05A 5152 bytes
SHA-256: 5cbbbeb441e218c9bb64241487350bd6b520e0b8b908a05e096bdcfcfcd0786b
font_02_sfnt_off0000e1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B4 11680 bytes
SHA-256: 27ea8c7babf3aacec8ba50eaf7a47a96a3654c8e00b47787d27d29b5e2d5fbf5

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