Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d94e378c74c674…

MALICIOUS

PDF

95.1 KB Created: 2021-05-21 01:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0693f5c6ba6cfa37f78b748cce02dd07 SHA-1: ec99cefc1c8c2b46621230987da4c3ee1a19f33c SHA-256: 20d94e378c74c674e63ee602d03e56decd959fb85756c6f1d8d90fdfb9469991
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is part of a link farm, directing users to external URLs. One such URL, 'https://baarspo.ru/strik?utm_term=how+do+i+make+an+appointment+at+the+texas+dmv+online', is presented in a way that mimics a search result, likely to trick users into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as phishing and a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/strik?utm_term=how+do+i+make+an+appointment+at+the+texas+dmv+online PDF link annotation
    • https://mozibidu.weebly.com/uploads/1/3/4/7/134763316/suxupolajud.pdfIn PDF document text
    • https://lasuresupaka.weebly.com/uploads/1/3/2/6/132683400/vewiro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5ffc9ccdb7524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422631/normal_6039b4df04ebb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404308/normal_5ffe196f3b809.pdfIn PDF document text
    • https://dopakujovifoba.weebly.com/uploads/1/3/0/7/130739833/koluban.pdfIn PDF document text
    • https://fowidejufato.weebly.com/uploads/1/3/4/5/134582967/nuzalaze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375889/normal_5fd094ea321ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446497/normal_5fd357988697f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/danebomusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a6410c-c2f8-46a5-b6da-6046d097efb7/mituratog.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/hp_laserjet_p1102w_setup_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/formal_email_letters_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/andhra_university_mba_syllabus_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e708f8-a535-46f9-b23c-19efb9b8719c/punctuation_exercises_for_class_5_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7b6107-e4f4-476a-b5be-96ae7f3a34de/mejilukuli.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/65142029804.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/mojidofutodosemotemaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/ap_physics_1_kinematics_test_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/31156372947.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/xigogirajatepagakuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63888c5-c1f4-4cd7-bad8-8fae845f564e/kalam_cosmological_argument_mohammed_hijab_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001258d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258D 5136 bytes
SHA-256: 03247b85de4d4e92d7463f7d31a1e7a5295f878ae322b03c292069ca112e578c
font_01_sfnt_off000136ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136EF 11708 bytes
SHA-256: bdeed1dbb4173e1b651a9f8ef73d12eb5a6d5e3a0d6e99481f49ce90f35c2eaa
font_02_sfnt_off00015ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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