Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d8d7108ddbbbf8…

MALICIOUS

PDF

91.6 KB Created: 2021-03-11 06:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ca066663d6085b1e903a870d271bf42c SHA-1: 8931b1ba98165b8111ba7085e3e532eb496abe1d SHA-256: 44d8d7108ddbbbf8538bf4053a2e793163b66f4b6428b9b09432eadc5560e913
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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, with one prominent URL pointing to a suspicious domain ('lozipotod.ru') that is likely used to host a phishing page or distribute further malware. The document body, though heavily obfuscated, suggests a deceptive lure related to a philosophical question, intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=what+does+be+at+peace+with+yourself+means PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450424/normal_6040fb72cb2b2.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/koicT9k/chicken_shack_redding_promo_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485313/normal_600c89e66b8f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_60343ce8c33f0.pdfIn PDF document text
    • http://manoligixave.66ghz.com/69222235391.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/simple_math_worksheets_1st_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/IKijUhH/kpop_profiles_nct.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472764/normal_602d4bebc15ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416791/normal_603d2b22b9120.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepuwiz.atwebpages.com/schengen_visa_application_form_online.pdfIn PDF document text
    • http://lagorov.rf.gd/63263869741.pdfIn PDF document text
    • http://liwumulexajuvi.epizy.com/good_character_reference_letter_format.pdfIn PDF document text
    • http://bilovero.rf.gd/90735956710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7086a6-a908-4bd0-9885-decad0d06bab/nordictrack_x9i_treadmill_price.pdfIn PDF document text
    • http://bumemelowogo.rf.gd/65339345924.pdfIn PDF document text
    • http://guminol.epizy.com/sarapebeferufawapufokekeg.pdfIn PDF document text
    • http://dudaturid.rf.gd/batiwogupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22bffcb3-e0fc-4f06-951a-62dd49b9bb8c/99855516157.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_off000128fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FB 5740 bytes
SHA-256: e9ce55bb3fba8e4b9fc9d1985e2c3538188533751b6ebebd779ad971d9c07b0a
font_01_sfnt_off00013c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C79 10788 bytes
SHA-256: 5756b60720f20254042a551cd0693a2415d72a6201a63ba6e73c98cdfdbcebca

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