Malicious PDF — malware analysis report

Static analysis result for SHA-256 45bab0f833e2ec2b…

MALICIOUS

PDF

66.5 KB Created: 2021-03-19 07:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3a9e7959b2a89455459a874ff31631d1 SHA-1: 2c852ebf8afe4d9d29e59b121d4f98a42ad3ff08 SHA-256: 45bab0f833e2ec2bd7f0fc1ca156e0e90d38601c102e9b4b746fb4b017f2e3fc
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing or trojan PDF. The document body, though heavily obfuscated, contains keywords related to a car manual, suggesting a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/123?utm_term=chevrolet+cobalt+2006+manual PDF link annotation
    • http://benivosefemiza.medianewsonline.com/20237755289.pdfIn PDF document text
    • https://cdn.sqhk.co/lewovazu/TOiijgH/car_parking_design_standards.pdfIn PDF document text
    • http://pestore.pro/xuxonefioueap.pdfIn PDF document text
    • https://cdn.sqhk.co/pogadidotilu/gd3whjh/94694951869.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/gjjaOgc/41516471103.pdfIn PDF document text
    • http://urott-hu.com/8679539620219g2x.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/5191961260.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/delonghi_argento_toaster_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_603f8061460b4.pdfIn PDF document text
    • https://cdn.sqhk.co/xorilulog/gggeJjj/zabeparun.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/Qjdvcja/99764129793.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/ji9Xxjb/6801_tower_road_denver_colorado_80249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414488/normal_5fee803e00e34.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/68135933536.pdfIn PDF document text
    • http://scriptbook.xyz/figorasotajibiwonetozumuuyhij.pdfIn PDF document text
    • http://kismyketio.com/7314190711asvm0.pdfIn PDF document text
    • https://cdn.sqhk.co/vujejanar/LicjfY1/segadogovem.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/gN9ieIZ/english_grammar_test_with_answer_key.pdfIn PDF document text
    • http://rikafitamedad.medianewsonline.com/medical_terminology_for_dummies.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedisijusa.onlinewebshop.net/biseptol_prospect.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/can_you_replace_the_battery_in_a_jbl_flip_3.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_off0000c805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC805 5396 bytes
SHA-256: 7ab5f4448297685e384c18ef1c407865387e36d56dddf0613b77d384f7191e5a
font_01_sfnt_off0000da38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA38 10196 bytes
SHA-256: 75b75fe10de0f131f7715180cc578be0d31c8d25bb3af604f579482f6f4f39a1

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