Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6ff8fd7b5b1c70…

MALICIOUS

PDF

75.4 KB Created: 2021-05-12 07:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e53089f949e4a4ec44f1af89d99ef27f SHA-1: 7cd1dbdf8352b629efa04e4e94eaf58fdbea3f22 SHA-256: 5f6ff8fd7b5b1c7048c2c1a563ce09898fbb6c54d234c396de3b5bc6724cbe5c
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified as a link farm. The primary URL, https://dugedepap.ru/strik?utm_term=do+i+have+to+be+fit+to+join+the+navy, suggests a lure related to fitness or joining the navy, which is likely a pretext to drive traffic to potentially malicious or scam-related websites. The presence of numerous links on disposable hosting and the ML classifier flagging it as malicious strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dugedepap.ru/strik?utm_term=do+i+have+to+be+fit+to+join+the+navy PDF link annotation
    • https://cdn.sqhk.co/livujiguf/dPhbXhM/stick_warriors_shadow_of_legends_mod_apk_revdl.pdfIn PDF document text
    • http://bitcoinchat.fun/what_is_too_lean_bank_1e0ul2.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/Hhhjagc/wedodidagaw.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/ih8MjiZ/photo_editor_tool_free_download.pdfIn PDF document text
    • http://spencermcman.us/74543602331ixaqs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490274/normal_604b4aaf750b8.pdfIn PDF document text
    • https://cdn.sqhk.co/kutagigixef/dhhUbhj/define_gloss_laminate_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/ef2N7hj/divx_player_android_apk_download.pdfIn PDF document text
    • http://arenaprobet.com/63989266655n61ay.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.pdfIn PDF document text
    • https://cdn.sqhk.co/sazuzaxokuk/gfifDhi/sbk16_official_mobile_game_redeem_code.pdfIn PDF document text
    • http://jobs-ingenieur.best/the_fox_and_the_crow_moral_of_the_story7ay1q.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/S7Chcif/99503482719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_605886837d107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426549/normal_603d212d35379.pdfIn PDF document text
    • http://xitnet.fun/compustat_north_america_data_guideng8v7.pdfIn PDF document text
    • https://cdn.sqhk.co/zawileveruz/fjhidsW/49418841235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493553/normal_6018ddb29a66c.pdfIn PDF document text
    • https://cdn.sqhk.co/savujegu/4qghFH4/run_ninja_run_unblocked_76.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/mikibetiv/los_tipos_de_medios_de_comunicaciones_que_existen.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/36018027363.pdfIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_586676849bc74ab2a0a3939423f996f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeponodij/54823769761.pdfIn PDF document text
    • https://eb7ae0bc-69c2-4833-8adb-ed465737bb77.filesusr.com/ugd/23493e_c2eebd75738c49cc8f541e86f0215baf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/automated_forex_trading_software.pdfIn PDF document text
    • https://4dd4a32c-aced-41d2-87e6-7ff9ca8080d7.filesusr.com/ugd/6d6f33_37d29572690f412fbe3ef420e28f110d.pdf?index=trueIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_6d0056bef6f14eccbb46c7fdcf26053a.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_off0000eb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB93 4924 bytes
SHA-256: 04902695c272350442fa04119d68a885673ce4c081c97d1229e07e357b523def
font_01_sfnt_off0000fc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC75 10412 bytes
SHA-256: 58d5809f678e2dfdb5bd042839a3c5cabd29034b541b978176c315f50ef6b462

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