Malicious PDF — malware analysis report

Static analysis result for SHA-256 15faa3b4a430162d…

MALICIOUS

PDF

68.8 KB Created: 2020-11-13 05:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9a3b39569f3923c22a0d1fa46d5695e8 SHA-1: b4f3747dbb8ab2b346ce83150246e6e0bec5c765 SHA-256: 15faa3b4a430162d7f567ad9f3791180baa3f0b7eb7078a705adb916b0a784e2
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to a redirector URL that appears to be part of an SEO link farm. The primary lure, 'Audio driver for windows 10', suggests a phishing or scam attempt to trick users into clicking malicious links. 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffnew.ru/aws?utm_term=audio+driver+for+windows+10 PDF link annotation
    • https://metubunotawe.weebly.com/uploads/1/3/4/5/134595280/916cfc8.pdfIn PDF document text
    • https://vadazexo.weebly.com/uploads/1/3/4/6/134646317/8149984.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/jexib-lolejaloki-labekikaro-gutunodexuxuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383794/normal_5f8c1d99a4fa1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/be951be8-9ae7-4af4-b76d-dd027377153c/gmod_gamebanana_weapons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da52f95d-e706-4442-9f4d-b874cea0c0e8/stick_games_unblocked_hacked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a076be15-6360-417e-82cd-3f676cc19fec/fotigodesabodib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c186307c-d755-43fc-9aca-930a8a72c265/87387311611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19856da1-5825-4b16-89d3-82439db66d28/dsm_iv_311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6baf0d14-4960-4faf-9b5e-ad7c078e0238/xidaf.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/zurumetoguvusilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44aac5f-b4ec-4b66-bbce-6126201b4a18/10217724424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4bbb2fb-a798-4092-b62d-ccca29db54cc/what_you_eat_is_your_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a626b8-6d7f-4950-b905-3f45496fdcbf/93991904931.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49C 4796 bytes
SHA-256: 871ef862fc40254aa196dc3d522096e24e244330f6f9e374d6fdb6b10f968636
font_01_sfnt_off0000d50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50D 10400 bytes
SHA-256: da0b39339e11e8389bd357d5a345eb0fdac0c281c7ca8c2f07fa990b0154e183
font_02_sfnt_off0000f874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF874 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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