Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e814196945340f1…

MALICIOUS

PDF

68.7 KB Created: 2021-03-05 18:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 241faac623ef754a152068b1e2cd09d2 SHA-1: cca9280aa48ab0ec278816e96ec074529fef08be SHA-256: 2e814196945340f152a768eb7c312253e53b51e3bd6535f2985db5c1a747e6cf
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous embedded URLs, with at least one pointing to a suspicious domain ('maypoin.ru') and another to a link farm on disposable hosting ('mywebcommunity.org'), suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=principles+of+microeconomics+2nd+edition+test+bank PDF link annotation
    • http://jikusofare.mywebcommunity.org/22554281173.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/tyler_model_of_curriculum_development.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/ge3emr5/rogue_hearts_apk_mod.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/does_procreate_pocket_work_on_ipad.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/63312858795.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/743407755.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/jdjcjbq/39860351391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forojiwimudobo.atwebpages.com/numb_patch_on_my_back.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a296c7b8-0944-4724-aa77-9fbdc62081bd/happiness_101_with_tal_ben-shahar.pdfIn PDF document text
    • http://pujumek.myartsonline.com/62300060765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5f1172-eee5-4a4d-b660-fb4b9b420392/76775444099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4bd625-db1c-4d32-88c2-a60a555b437b/zojirushi_home_bakery_supreme_bread_maker_bb-cec20.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/namirubo.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/16854403490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce25976-4934-4132-90d4-2ae290f5d380/every_other_day_diet_book.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/3d_font_free_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1943e5-965a-4339-bbdc-3d2528345336/rapixidura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae4000d-284f-448b-af9b-57d64bc8f856/circuit_analysis_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/reporting_an_accident_at_work_procedures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a29960e-79f9-420e-b552-de70f6e76eea/rowufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a348a2-83f2-43d2-a7f6-49be09e550af/cinder_marissa_meyer_movie.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_off0000cf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF83 5640 bytes
SHA-256: 68da288de0756c785db6d959bdd89d6e65c250ed2b50e663e8192e48bbe2c2c6
font_01_sfnt_off0000e295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE295 10084 bytes
SHA-256: a4ab51eafa3d9aa0a79578580796967706a3c1f0f1beb6ca88618db01985b2d7

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