Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b0525f33cc6901…

MALICIOUS

PDF

72.1 KB Created: 2021-02-21 05:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 11183093732f91c9e98be35208f859d8 SHA-1: 4ae1a0e9ef2fb1946da449861879fd655bf2fa98 SHA-256: 12b0525f33cc6901febd3d3fe9f0578f5730b8cf0d8e3a1b53f6d9df8a076edc
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of an embedded URL further supports the idea that the document is designed to redirect users to potentially harmful external 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/strik?utm_term=is+mercruiser+5.0+mpi+fuel+injected PDF link annotation
    • https://tineminelebon.weebly.com/uploads/1/3/1/6/131606156/1657368.pdfIn PDF document text
    • https://kanumipiga.weebly.com/uploads/1/3/5/3/135346224/841659.pdfIn PDF document text
    • https://mogeletonedilo.weebly.com/uploads/1/3/1/4/131482944/ba90391a.pdfIn PDF document text
    • https://nunodovov.weebly.com/uploads/1/3/1/3/131380210/a4ad5807e11e.pdfIn PDF document text
    • https://xurexesezegurez.weebly.com/uploads/1/3/4/0/134096141/3730589.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/fibuvokas.pdfIn PDF document text
    • https://nutovavodus.weebly.com/uploads/1/3/4/0/134012609/gosomeni.pdfIn PDF document text
    • https://nubiduxabegi.weebly.com/uploads/1/3/1/8/131871606/jebuj_gegofakis_wixev.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/3858902.pdfIn PDF document text
    • https://tekaxudifen.weebly.com/uploads/1/3/5/9/135992886/3724ab1dbdb.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/871573.pdfIn PDF document text
    • https://cdn.sqhk.co/nenakowi/ziuNgh6/best_mystery_romance_books_2019.pdfIn PDF document text
    • https://gipebikurowa.weebly.com/uploads/1/3/4/0/134095939/750b4bfe4b3.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/jupevuxirapi/sololearn_apk_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/xunozofipadixes.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/best_car_racing_games_for_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/resistor_color_code_worksheet.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_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 5404 bytes
SHA-256: da65d9ec0f57b69c0d0bfa591bca16143e1e945e7646cfc4895e6e6425f4274a
font_01_sfnt_off0000edd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD6 11088 bytes
SHA-256: 51559a1f400f6af0018a5d2b0d37ad2b3458368bdebe27679e88acd5ffb23d88

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