Malicious PDF — malware analysis report

Static analysis result for SHA-256 6354fa24445543a8…

MALICIOUS

PDF

83.2 KB Created: 2021-03-17 22:16:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 133677dd73477825f6c1c413d85c9252 SHA-1: 6a5381247bcfd17ac154ee456c8f656e579330b0 SHA-256: 6354fa24445543a8cec451068cf22d28941f886fa29eb9ce2a7b289948590c5c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to 'https://ponafet.ru/wix?keyword=polaroid+snap+touch+manual', suggesting a lure for users seeking a manual. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The ML classifier also strongly flagged it as malicious. While no scripts were explicitly extracted, the PDF structure and URL distribution are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=polaroid+snap+touch+manual PDF link annotation
    • https://cdn.sqhk.co/dorejewibiz/XggY07p/download_aqualife_3d_mod_apk.pdfIn PDF document text
    • http://nisisigewu.iblogger.org/lifesource_blood_pressure_monitor_user_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/haVjbia/31390257555.pdfIn PDF document text
    • http://kepumomojixuwog.iblogger.org/nolesigaxuful.pdfIn PDF document text
    • http://nelunufibedu.iblogger.org/wamotisas.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/3SiehaH/67202531158.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/dihzhgx/rojetepipegid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifajone.rf.gd/65776882506.pdfIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_86cd8d002c3b465c95a55476f695ec82.pdf?index=trueIn PDF document text
    • http://doliwoxebokuk.rf.gd/vinimevebusofepeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/abraxane_prescribing_information.pdfIn PDF document text
    • http://foburug.rf.gd/watch_its_kind_of_a_funny_story_free_online.pdfIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_46992099c7d9415db273a02fc26e95e4.pdf?index=trueIn PDF document text
    • http://zivuneko.epizy.com/oxford_picture_dictionary_second_edition_english_arabic.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/lujalanegozakezexu.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/biology_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/the_invitation_oriah_mountain_dreamer_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/51908104867.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/81039686087.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_off00010058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10058 5312 bytes
SHA-256: 6552b8cbad04a5df4a158b3ef5d9a965b023dd68b99e7d14888e239c528e555f
font_01_sfnt_off0001123c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123C 15580 bytes
SHA-256: 4546ae9098cc392704ad6b90dc48becfbb99488e4f45bade6396145e0b2d4ebc

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