Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4ebe070b4f80dd…

MALICIOUS

PDF

76.3 KB Created: 2021-03-07 00:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7588574247d708e5182088ff2f5de560 SHA-1: 2cf172de0dc722b96a33d9b455bb8ff425e7b3b5 SHA-256: 7e4ebe070b4f80dd81d90cd0acebd85ac899786b02e228d388d927d616ce8649
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9742

Heuristics 6

  • 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 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://xajibur.ru/award?keyword=honeywell+electric+radiator+heater+reviews PDF link annotation
    • https://cdn.sqhk.co/xesozugis/JFjgijR/62186604441.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/Igjhejg/cbs_sports_fantasy_football_12_team_mock_draft.pdfIn PDF document text
    • https://cdn.sqhk.co/sobekalob/gghjexG/legendary_brawl_stars_apk_hile.pdfIn PDF document text
    • http://hookup754.fun/what_is_the_best_example_of_a_vestigial_structurectwps.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/CjbDigY/asexual_reproduction_by_spore_formation.pdfIn PDF document text
    • http://neuroncraft.online/mcdonalds_franchise_agreementz17sn.pdfIn PDF document text
    • https://cdn.sqhk.co/remozemot/gggdujb/simsimi_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/goxupolofodi/KLBjad5/37806616137.pdfIn PDF document text
    • https://cdn.sqhk.co/torazanopuni/Qhj6jfD/3583058801.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/62hidzn/27170615120.pdfIn PDF document text
    • http://academic-club.ru/heart_perler_bead_template636lm.pdfIn PDF document text
    • http://ilkertr.shop/ecpow_ugo-v_ii_manualzbsch.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/cl8shc2/vex_robotics_hexbug_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/hfvbfzF/nizezuvoxonijoveme.pdfIn PDF document text
    • https://cdn.sqhk.co/denalivek/85ihidZ/battleground_survival_mod_apk_android_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_ded804d1be45434292fffb519cf29c52.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4a3676-660b-43f8-8252-6af2488adaab/dowijudovuxituvanuzas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c556a5cc-047c-4aa3-8a92-2eaa431d5c8c/rio_2_beautiful_creatures_portuguese_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f0781e1-ac62-4c1c-8312-b8db0e22dfb1/2728518455.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_20a0397c91844fc28b8baf00dee835e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d499188e-1c65-4040-a38e-1d2f7c649d02/how_old_is_percy_jackson_in_book_1.pdfIn 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_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 5244 bytes
SHA-256: 37606b9724a98aa97f4b2b7f7237fe4aff336dfd0fa98f4cdd7e3082895d4a87
font_01_sfnt_off00010c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 10256 bytes
SHA-256: 6efe4ecfb6958141cf0a85aff9cc55d8a9c71f82a135fa0e54326f75fc77c2f6

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