Malicious PDF — malware analysis report

Static analysis result for SHA-256 328e30c4ade9a64b…

MALICIOUS

PDF

78.0 KB Created: 2021-03-22 18:55:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b60f82002ced878164b8237d2e6032b2 SHA-1: 0c815f379c948c5f1347f7ae1163003b91c8105e SHA-256: 328e30c4ade9a64bea52710991858a402185b78b8a63a0743ab59a744d8c6fe0
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The presence of a ML classifier flagging it as malicious and ClamAV detecting it as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded URLs, such as 'https://lozipotod.ru/aws?utm_term=bissell+proheat+pet+advanced+carpet+cleaner+89108+manual', are likely part of a phishing or malware distribution scheme.

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://lozipotod.ru/aws?utm_term=bissell+proheat+pet+advanced+carpet+cleaner+89108+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490252/normal_5fd76b9952187.pdfIn PDF document text
    • http://quickstore.pro/venaxuyk2pw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_6031401c317b9.pdfIn PDF document text
    • http://italy50wow.pro/parental_stressor_scale_neonatal_intensive_care_unitjsvmc.pdfIn PDF document text
    • http://fruit-citrus.space/taxoravefamulaxumejapefip1cvz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407807/normal_6002ad2419dda.pdfIn PDF document text
    • http://7lessons.space/chandrakanta_episode_38cw039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_5fe63286ecb34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_60120bb07b7dc.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/xovekolamoxe/birthday_card_template_publisher_2013.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_72db213256954aa0a0e92d15f78cb7a1.pdf?index=trueIn PDF document text
    • https://7737876a-f762-42ef-af6f-18b78abacabf.filesusr.com/ugd/9066bd_e120d1f0351e4e37b1d51a1f8a09c5f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/miller_syncrowave_250_dx_tig_torch.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/trane_cgaf_chiller_manual.pdfIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_2c3dfeeef27d41c7995053e381b4cae5.pdf?index=trueIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_8bd6ab7a46f44ee7a7d173972ebe52df.pdf?index=trueIn PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_5502996fc81b49a79f9c53a6c4c268b7.pdf?index=trueIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_8328f6195c1349918667984751b90a6d.pdf?index=trueIn 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_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 5968 bytes
SHA-256: 2f9d407f8528e57abf4dd1fa90e4e9df8b839b48e6111ce651b5cc19cc4f8f5d
font_01_sfnt_off000104d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 11060 bytes
SHA-256: dfa403f392677dcaa0b4a4c642512922a59ef18e802b9effcf4bd7e933c2d61b

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