Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5c00b929293735…

MALICIOUS

PDF

74.5 KB Created: 2021-06-12 00:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 46aa52b94b9763cf8e3a4f3bf9a12970 SHA-1: ce802db3452fe50f251321dec1254408652ad1f9 SHA-256: bc5c00b929293735e2ac8f3e51df2445c10c45454196f652a270b0d87517099b
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 identified as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('synerhu.ru') that is likely part of a link farm designed to redirect users. The PDF's structure and content suggest it is intended to act as a lure, potentially for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://synerhu.ru/pbw?utm_term=bedpage+north+jersey PDF link annotation
    • https://wiromokuxuzub.weebly.com/uploads/1/3/5/2/135298753/muxuxupitoburorat.pdfIn PDF document text
    • https://sadaxolofomet.weebly.com/uploads/1/3/1/4/131453623/fomafize.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/0a47903a54cb.pdfIn PDF document text
    • https://xesudubivutomu.weebly.com/uploads/1/3/5/3/135303490/rokopetogaponogenoti.pdfIn PDF document text
    • https://zefijevizo.weebly.com/uploads/1/3/2/3/132302816/wisomapa.pdfIn PDF document text
    • https://zinikedefi.weebly.com/uploads/1/3/0/7/130740178/zipeforaf.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/614c49c6-0737-45f2-ae6f-f661e0079732/sirius_xm_free_hack_android_phone.pdfIn PDF document text
    • http://xawaren.pbworks.com/w/file/fetch/144419163/developing_skills_for_the_toefl_ibt_intermediate_listening_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53833bb8-bfa7-40d1-a1a6-b600391c0f38/kirkland_applewood_smoked_spiral_sliced_ham_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d2fdf6-e4dc-473e-9a35-be669881a150/jefipuvimebaminorigop.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144812505/how_to_use_self_inflating_camping_mat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6511adcd-980f-435c-a2c0-6046871265cd/how_do_i_fix_unarc_dll_returned_error_code_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60692ac1-61c9-4173-931b-e3fd95e26169/keviz.pdfIn PDF document text
    • http://rorazokazog.pbworks.com/f/wujopokimawis.pdfIn PDF document text
    • http://sozakuvepar.pbworks.com/f/download_game_gta_v_mod_apk_data_obb_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3cbaaa9-3a6b-45b0-b043-623241e9f3af/bagogogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039638e8-c59e-4691-b170-e3a172bc576f/venezadopodanez.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77A 5416 bytes
SHA-256: f3b67e32749100addb89fac673f7618957592b72b22929329993864304058c45
font_01_sfnt_off0000f9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F3 10232 bytes
SHA-256: 3bcda136eae79056300d3fa13fd5f739cc576ed817fee3f78e6a5df09d8a2b5d

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