Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8b660f4e2a71f3…

MALICIOUS

PDF

81.6 KB Created: 2021-03-14 15:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 010c0e8782aee761bd4749af9211de1c SHA-1: 0408a6d2b199f9ebd234a8a061752a9e8fd0f9ed SHA-256: cc8b660f4e2a71f3da602fb91aaa913ebd5ebf0febd6512aab835c7584c664c5
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to lead the user away from the document. While no scripts were directly extracted, the overall structure and URL distribution are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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/123?utm_term=free+printable+scrabble+letters+pdf PDF link annotation
    • http://trokot-roznica.xyz/keto_dessert_recipes_dairy_free21z2r.pdfIn PDF document text
    • https://bujivopipagafo.weebly.com/uploads/1/3/5/3/135321681/dasigidatadefaritemo.pdfIn PDF document text
    • http://onlinetyz.xyz/the_hungry_tide_by_amitav_ghosh2ccwz.pdfIn PDF document text
    • http://medway24.com/gaggia_brera_spare_partskey3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426263/normal_60161541902c7.pdfIn PDF document text
    • http://henrysavbr.site/gisimutidi1ndhr.pdfIn PDF document text
    • http://nasporte1.fun/toggle_windows_key_shortcutsuzi1.pdfIn PDF document text
    • http://helpforteam.com/833714679e0bnw.pdfIn PDF document text
    • https://rabivavas.weebly.com/uploads/1/3/0/9/130969809/7544811.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471958/normal_5fccf58a5abec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382414/normal_5fe57d0823e72.pdfIn PDF document text
    • https://sodolujakuxef.weebly.com/uploads/1/3/1/3/131398606/fb0529ac25dc.pdfIn PDF document text
    • http://tgesheff.xyz/boxers_and_saints_analysisfwe15.pdfIn PDF document text
    • http://italiahot.fun/jawbone_jambox_app_iosh5foa.pdfIn PDF document text
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/soxumapamupakexi.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/5507f93b-a040-4f75-9583-89d5966fd230/27316672054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/652219e0-c9c9-4eaf-8c41-5b7b78ff799e/adventures_of_mana_review_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7089cd3-7df2-4ed2-a88c-7d622c604000/ruger_lc9s_with_crimson_trace_holster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479db91e-50ec-439a-9652-b593e478b04a/25149986191.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/32889507717.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/87553467807.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/vukevutobezimunobixeris.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/bawufa.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_off0000f5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 5244 bytes
SHA-256: b6f0cdf912d67ca39a0ab289060e1571ae7179071664fb19d8a71f5eb1ab0f58
font_01_sfnt_off00010798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10798 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00011028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11028 11268 bytes
SHA-256: 2fed4b0b0e39f5037742a72ada9ec097643eb037c04df0084c07e4af3526f684

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