Malicious PDF — malware analysis report

Static analysis result for SHA-256 868e73e7e05c6f47…

MALICIOUS

PDF

73.4 KB Created: 2021-06-04 12:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9b6adde4bd8073d740e2f44c268de7fc SHA-1: 74727382bfdcbd2ce2fff22f9c132ba224b205e4 SHA-256: 868e73e7e05c6f47bf19752e6e7cc113db77a02db8c7dce9b2ff13af2c403b4d
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-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.
  • 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://philabc.ru/pbw?utm_term=arunachalam+telugu+movie+mp3+songs+free+download PDF link annotation
    • https://gopaxabog.weebly.com/uploads/1/3/5/3/135309926/jomepajuvile.pdfIn PDF document text
    • https://xuguzopagar.weebly.com/uploads/1/3/4/4/134490213/naxuwunogibudu.pdfIn PDF document text
    • https://xisaluzesa.weebly.com/uploads/1/3/4/6/134602292/nuwelamamixor.pdfIn PDF document text
    • https://fuwidomanajano.weebly.com/uploads/1/3/0/8/130874101/nixukipemuzej.pdfIn PDF document text
    • https://pepexelizuruxu.weebly.com/uploads/1/3/4/6/134656498/8672830.pdfIn PDF document text
    • https://nonadokemiraf.weebly.com/uploads/1/3/0/9/130969568/surop.pdfIn PDF document text
    • https://lupuxamugegudi.weebly.com/uploads/1/3/4/6/134623484/wuxivofakupinep-xukin-weben-rilejixemisi.pdfIn PDF document text
    • https://wovipoxutoluku.weebly.com/uploads/1/3/1/3/131383624/438725.pdfIn PDF document text
    • https://bajurajatug.weebly.com/uploads/1/3/6/0/136054821/6401932.pdfIn PDF document text
    • https://xegiduburap.weebly.com/uploads/1/3/5/2/135294675/fomavugixe.pdfIn PDF document text
    • https://rozinezo.weebly.com/uploads/1/3/1/6/131636990/damezenimajaveriruwu.pdfIn PDF document text
    • https://makigomeludawuk.weebly.com/uploads/1/3/4/7/134748455/didexax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wufamazajo.pbworks.com/w/file/fetch/144595329/26962141314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49783eac-3ffb-489a-abdc-a51ae91bf5cf/polk_magnifi_max_sr_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e591fd9d-b549-492c-8d42-1f30ca8d009d/larokogirufijowesowox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe1f6c0-e538-486f-a82f-bbf4120fca0d/tepepagolulamori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81e8681-9c3a-4f3b-97a8-55d5744427fc/ruzejovasof.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/f/can_you_only_use_procreate_on_ipad_pro.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/w/file/fetch/144424986/tajutubufizadizojinokin.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05A 5876 bytes
SHA-256: ab1fb3672e37de525e886c25d2e6ebe3afce8a9ff04905b840c2112ef9217c81
font_01_sfnt_off0000f447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF447 10432 bytes
SHA-256: df2a2ecb459927f266319c28d749161c67f8d0b353b1b1014d5f50abd04d7f32

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