Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ad613bb7bd2cec…

MALICIOUS

PDF

77.1 KB Created: 2021-02-10 18:56:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 11b4acdf7662922058d891f8cfc7ea14 SHA-1: cc531558367a6f35cf9ac61fdab2ed370d5a1f01 SHA-256: b2ad613bb7bd2cecbab17af7426f2230f140d3da8073e4270991d0c561f7bb14
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many pointing to disposable domains and Weebly-hosted PDFs, indicating a link farm. This is further supported by heuristics flagging it as a PDF SEO link farm and a disposable link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute malware or engage in phishing through the linked content.

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://leonvi.ru/123?utm_term=switch+axe+build+mhw+alatreon PDF link annotation
    • https://zexirajeroluwub.weebly.com/uploads/1/3/4/8/134848753/9215952.pdfIn PDF document text
    • https://batusapetedovug.weebly.com/uploads/1/3/0/8/130873971/7d98b898a0.pdfIn PDF document text
    • https://gipewiraxo.weebly.com/uploads/1/3/5/3/135334151/7643df789df1e.pdfIn PDF document text
    • http://djami.ru/mibidorewebixofabeniwalq614.pdfIn PDF document text
    • http://katermore.ru/5877675662ql6ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485301/normal_600541f4ee749.pdfIn PDF document text
    • https://zulozagadome.weebly.com/uploads/1/3/4/3/134318764/457055040fb15f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417814/normal_600101c6597ef.pdfIn PDF document text
    • http://pornbustyvids.com/shatter_glass_weedronq5.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/9578036.pdfIn PDF document text
    • http://sozetil.66ghz.com/free_powerpoint_templates_medical_theme.pdfIn PDF document text
    • http://the-glow.ru/gajiwasumilawlvyy3.pdfIn PDF document text
    • http://zubiki.top/9562834464877tty.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/8Shbgji/wallpaper_tumblr_hd_flowers.pdfIn PDF document text
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/mopogokexeramax-kozafiri-bawodivanad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480749/normal_5fdcb53b4dd9d.pdfIn PDF document text
    • https://gepogixuzusesil.weebly.com/uploads/1/3/3/9/133999736/05f38f3a6b2.pdfIn PDF document text
    • https://cdn.sqhk.co/lojenozasila/ijgQVhd/69005274429.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jomabav.epizy.com/chevaux_voiture_formule_1.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_off0000e462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE462 2888 bytes
SHA-256: a34f6133241b0e53c3cfe1f853016e916a3d7180b6d3b88390408fd04f35e9f6
font_01_sfnt_off0000eea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA6 5404 bytes
SHA-256: b54d48005d5051735089277db394d247813833748d17bd7374488725f4bd8c20
font_02_sfnt_off000100f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F3 11076 bytes
SHA-256: ba5dcc737ae75cf4c8d70999d5345b14f956acfaf174f4c9aeb9b0afbecc5f53

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