Malicious PDF — malware analysis report

Static analysis result for SHA-256 5588063bc62cb69f…

MALICIOUS

PDF

75.9 KB Created: 2021-03-13 18:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 972df0e5a1c44a9292e55c2158a40661 SHA-1: a93df09406fb4571d84874719eaf339887fb6d52 SHA-256: 5588063bc62cb69fb4b4deee3694dcc42035eaa1e9bad48257625375d60ea792
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The document body, though heavily obfuscated, suggests a lure related to product sales, which is a common tactic for phishing or malware distribution.

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://nipisod.ru/123?utm_term=super+king+flannelette+sheets+target PDF link annotation
    • http://freud.icu/what_is_a_recovery_bible9ri56.pdfIn PDF document text
    • http://legendarycraft.ru/entrepreneurship_successfully_launching_new_venturesnjtkw.pdfIn PDF document text
    • http://farvestnn.ru/sawosarelixolabuzanilifuf6zsm.pdfIn PDF document text
    • http://scm03.ru/1918075437aglwr.pdfIn PDF document text
    • http://yarrebitteh.online/how_to_overcome_depression_at_universityp5dsh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495265/normal_60183805f34fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477409/normal_5feb7b5c775fd.pdfIn PDF document text
    • http://accueilcmb.com/80935111003ckpla.pdfIn PDF document text
    • http://romeita.fun/913123091637umj9.pdfIn PDF document text
    • http://momentshop.space/levuze6khsy.pdfIn PDF document text
    • http://presentinsta.site/92581560918oekgp.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/xejudopurodlw336.pdfIn PDF document text
    • http://qrastenmap.online/511507644370wn9d.pdfIn PDF document text
    • http://stakingyfi.com/449800780657l0vy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485718/normal_602b6c61e5bb2.pdfIn PDF document text
    • http://hesap-al-sat.com/how_to_learn_electronics_at_home6oixu.pdfIn PDF document text
    • http://biolinkus.me/how_to_port_your_phone_numberhxa9v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_3ff31a86965446428b3b583e2178a14c.pdf?index=trueIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_d857405f76d2445382ec8c6222038b9d.pdf?index=trueIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_3003959e8c6944b687a93a90184d935f.pdf?index=trueIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_e1cd63653c90483da6e770f36001f13c.pdf?index=trueIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_901bde1514f74c61976f3870c14c3fe7.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_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 5328 bytes
SHA-256: f291578e53676ca64ebf44742e49536022837f5e357aad0bcdd540d64965155f
font_01_sfnt_off00010105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10105 9688 bytes
SHA-256: da34734e78516e895ecdf4065ca70922b22ee69078fb718d91acf92b28dafc18

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