Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f2ce07a0081172…

MALICIOUS

PDF

81.6 KB Created: 2021-04-10 10:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 80053c6f3b8ffa172381cb0fbbd57d5a SHA-1: 116062124a86c17dccd5105ded3b2dcd66c58eea SHA-256: f2f2ce07a0081172e1d2e0788fc01459c7a3ed187fe2f74585cff7348582af17
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 multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs, many of which point to disposable hosting or redirectors, suggesting an attempt to distribute malicious content or phish for credentials. The document body, though heavily obfuscated, appears to be a lure related to product instructions.

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://golowaki.ru/strik?utm_term=shark+euro+pro+x+steam+mop+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4506063/normal_5ffd6368e8c09.pdfIn PDF document text
    • http://fagixadako.iblogger.org/how_much_do_computer_engineers_earn_in_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480736/normal_604d90c8d4bbb.pdfIn PDF document text
    • http://volulolusawaz.mygamesonline.org/sindrome_de_fatiga_crnica.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474445/normal_604db2faa68cd.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxinugokas/ehixOhb/wejesapazu.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/92213029459.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/bexorewinegalamakabibu.pdfIn PDF document text
    • https://cdn.sqhk.co/lasijutag/OSicgc7/jakatovuxiwobadam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464710/normal_60497a1f71168.pdfIn PDF document text
    • http://minosijasif.mypressonline.com/sikinuvenibolesiginas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477155/normal_5fda312e6845f.pdfIn PDF document text
    • http://kusadelopo.iblogger.org/69379431044.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kovobopejuwego.rf.gd/electronic_amplifier_circuits_theory_and_design.pdfIn PDF document text
    • http://bususetut.epizy.com/roxadumuzunoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294f3041-2bec-464b-9d3a-d30715300092/diablo_3_reaper_of_souls_save_editor_ps3.pdfIn PDF document text
    • http://tasodeporojunez.epizy.com/wajidureluxopamebadigom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9af5d640-24d7-4c21-957b-49454f488d68/this_is_where_it_ends.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3f14f2-ae44-4514-a427-2c0d1b655ed4/roxidusetewab.pdfIn PDF document text
    • http://vatoduk.rf.gd/23689796062.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_off0000fe4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4D 5376 bytes
SHA-256: 38a8545552223aea849297f85008bb708227ed409a76db157c4b007036ab582e
font_01_sfnt_off0001106d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106D 11592 bytes
SHA-256: 9c5a569a38bdfce721991beec5f65d9b8778b764cd316db37f4c16fdbdcd0b1d

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