Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac29f5c04ae27906…

MALICIOUS

PDF

70.6 KB Created: 2021-02-14 01:08:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2b22f15aac15c25ce591b3e4b20129f3 SHA-1: 230e5b7801cd1b8d18d782c941f5a564982f4f46 SHA-256: ac29f5c04ae27906dbea5889063c2402be674b2251c385d08445eb5e4713bbdc
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'Channel 7 tv guide mackay', which appears to be a lure to direct users to these malicious sites.

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://jottigo.ru/aws?utm_term=channel+7+tv+guide+mackay PDF link annotation
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/924672.pdfIn PDF document text
    • http://uablog.website/tufabovotumomowaogb3l.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/YZhdqkf/fubudubewumevaraxirikiv.pdfIn PDF document text
    • http://boomua.site/remix_song_maker_app_for_android5rz5m.pdfIn PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/320996.pdfIn PDF document text
    • https://cdn.sqhk.co/madosodu/gjjjieM/antique_tractor_pulls_in_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/hhfhejc/bebadewajalewe.pdfIn PDF document text
    • http://bestita.space/diccionario_canario64c7z.pdfIn PDF document text
    • http://blablablacar.online/pobenubikugeletafodyx0d6.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/hgjcgdH/22253068814.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/dyid5NQ/76593115519.pdfIn PDF document text
    • https://cdn.sqhk.co/vefutifeves/gtnjaGL/chores_definition_in_russian.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiwuximu/hajgMgi/nook_read_ebooks_magazines_apk.pdfIn PDF document text
    • http://kraftmann.su/vipile8u7f4.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/rudelazifizuvo/pijesoxakimonevababigupi.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/kiwaxul.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_off0000d3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E3 5292 bytes
SHA-256: 130b724ae0833fb3b567ce7a96d357d190fc4838a22b25b703fd791eda84e4a7
font_01_sfnt_off0000e5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D1 12988 bytes
SHA-256: 5ca404b5f25bc6493dfc4d3bc0ee328ee86adfea15d9948286c1aac36595d8fe

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