Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b14a0b25f72a1a9…

MALICIOUS

PDF

80.1 KB Created: 2021-04-04 22:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 54a29586fe64a4a778b7abf0cf4de12b SHA-1: 80c43008d60f719e971483d4a38bcca30dfd1307 SHA-256: 0b14a0b25f72a1a97a98e6942c991c1185dc604eda058a83656cbc7162c41a77
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 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://nipisod.ru/strik?utm_term=a+random+walk+down+wall+street+editions PDF link annotation
    • http://goromeo.club/271846750597uqur.pdfIn PDF document text
    • http://misstourist.info/bezudizikuxifagoxamefxk7h.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/astrology_manual.pdfIn PDF document text
    • http://20970907.net/ford_explorer_sport_trac_2002_motorcvj09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_6042e4b135b1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_601f2ebcc6ab2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419828/normal_6008ab3cdc15c.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/bipolar_disorder_articles.pdfIn PDF document text
    • http://alkim.xyz/21725639244lpcpg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377905/normal_5ffbfbf283d5e.pdfIn PDF document text
    • http://uablog.site/49722785436ajzy2.pdfIn PDF document text
    • http://fumumowovufa.mywebcommunity.org/weight_loss_smoothies_recipes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e3349e-1df3-4c5a-91d0-6953febd840a/wasugisegafib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa5753a-e1b7-42d0-a406-ab78cfcc352e/33763713443.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/pakadigoxedub.pdfIn PDF document text
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_57071145ecc945e9aa9de9ff526c472b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/xudop.pdfIn PDF document text
    • http://wusuposakatoxel.myartsonline.com/pazogutuvosizilef.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/9814074317.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_6df2a1f652834e1d8f33b13a0fbe1be2.pdf?index=trueIn PDF document text
    • https://52f9d6e5-2fd5-4906-a030-4d12f703b62a.filesusr.com/ugd/297ecd_873e68b0acbe40878c4303c371a9928e.pdf?index=trueIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_fca5db647ac945c7a12195bc7a19c16f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/71279997887.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_off0000f966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 5116 bytes
SHA-256: a7ec23d40377a89ff34db5f096760df0c274487e39bec4af6e5e0823c59eef7e
font_01_sfnt_off00010ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC6 11300 bytes
SHA-256: 10a0bdc9e086b795f8b198295e8357f909a7d255b3cf3880ae00e75b9efbb982