Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca46ac95eceae457…

MALICIOUS

PDF

74.8 KB Created: 2021-02-21 18:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 73f5cce2fa3a07aacc3a22e836c853e5 SHA-1: db85578a56b0a94b2afa434f20eb7f0824cf074d SHA-256: ca46ac95eceae457c64412613832020deb348eefcca4fe1850c1d760f7892f82
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing and malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wb?keyword=how%20to%20setup%20logitech%20harmony%20650%20remote PDF link annotation
    • https://cdn.sqhk.co/zesonixiv/BgjVhfm/56611672779.pdfIn PDF document text
    • http://coolmag.biz/gilonolubemujibutxsvg4.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/WYNjl1x/marble_machine_piano_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421970/normal_603093ff9406f.pdfIn PDF document text
    • http://thedefenseforge.com/xalofaseladorovelofelu63ecn.pdfIn PDF document text
    • https://cdn.sqhk.co/lojumisebu/hjgIjhQ/war_and_order_apple_game_center.pdfIn PDF document text
    • http://realnoe-obshenie.online/8415282145645jdv.pdfIn PDF document text
    • https://cdn.sqhk.co/refimadaraze/mignhcK/wijevesosajoronuwok.pdfIn PDF document text
    • http://fortuneo.best/bacterias_coliformes_termoresistentes2oybk.pdfIn PDF document text
    • http://trychambre.xyz/vertical_and_horizontal_communication7hm79.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/fggNddn/the_lightning_thief_audiobook_chapter_3.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/ibIhdVZ/77370515796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461229/normal_5fe3305e7fe28.pdfIn PDF document text
    • https://cdn.sqhk.co/zagakobafot/liehjKY/amazon_alexa_deals_of_the_day.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/hax7Gji/download_euro_wood_cargo_simulator_3d.pdfIn PDF document text
    • http://help-business-media.com/90159634032oo5zz.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/h3jdFvT/tozofaseve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_601f03cfa4cbf.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/jifedefujodu/95771695647.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/jetty_park_pier_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/kojenuradogid.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/calorimetry_physics_lab_report.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE595 5924 bytes
SHA-256: 3b6512672f36052ab54b4d90f32070ed4e6c3465f7b8ba0a6ba4e88feddeced3
font_01_sfnt_off0000f9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B7 10656 bytes
SHA-256: ad889bdd847d7e687432e0470dd5f5f6dc483d79e5fd44295ff0c60b69eb0ee7

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