Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6daa0c27e3aa9cb…

MALICIOUS

PDF

78.6 KB Created: 2021-03-05 12:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3ae79a2ca407a3d2b77b1474d5bd6e7d SHA-1: 03ca3fe20c6be8ce07682f29325ff6aedc2026d2 SHA-256: b6daa0c27e3aa9cb90f5942b656084854f8939592662ea7ddc68b6aed2bd466b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to multiple external domains. The embedded URLs, such as https://dugedepap.ru/strik?utm_term=shimano+ultegra+di2+brake+lever+reach+adjustment, likely lead to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=shimano+ultegra+di2+brake+lever+reach+adjustment PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452148/normal_6012882493b6d.pdfIn PDF document text
    • http://ledozikatiresev.scienceontheweb.net/how_do_i_reset_my_samsung_nook.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/dadYidd/hearthstone_battlegrounds_card_upgrades.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/34873076671.pdfIn PDF document text
    • https://cdn.sqhk.co/gadakoferupa/cgdCsjj/papiwubutumopixu.pdfIn PDF document text
    • http://matras-24.ru/93202031305yyin4.pdfIn PDF document text
    • http://choosenews.space/34141765041ejlp4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456121/normal_601ec49387ff0.pdfIn PDF document text
    • http://vitrinachel.ru/category_b_biological_agents_shippinggmtxz.pdfIn PDF document text
    • http://verifedform.com/babette_s_feast_full_movie_freedhsdz.pdfIn PDF document text
    • http://bratskpravojur.ru/underworld_blood_wars_in_hindi_mp4moviezkjzav.pdfIn PDF document text
    • http://usacarins.com/another_brick_in_the_wall_songjaleu.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/jhgf6jj/wujexuzobasome.pdfIn PDF document text
    • http://busurman.space/audition_next_level_love_party_guideo7pt4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409826/normal_5ff040d6215e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_6039b53882948.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/896470057714lblq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_6020cc772ed4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_c92e2182a85e45e5be5d5f117a4b1ed8.pdf?index=trueIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_e4d23991aaa2458ebe6c8ff647d0d6a0.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_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 5928 bytes
SHA-256: 2bca045b49088661f44054916d044d6090fa151d8f23d7143bc1bd11520f1259
font_01_sfnt_off0001074f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074F 10820 bytes
SHA-256: 1a13636704fa6a65d64cdd9dfe1bfce31b3f6f480bd9ba40690d64e9bc888979

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