Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab0b942aef1bfa5…

MALICIOUS

PDF

80.0 KB Created: 2021-02-13 15:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3f6e98fcaf04514a64ad73934dd48858 SHA-1: d31cff1972e56f0cbcc43f32e8a96bd7c3782957 SHA-256: 3ab0b942aef1bfa595b13c36442b0bc6eaf3eaa0808a41d0c7777258b572d704
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are designed to lead users to potentially malicious websites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL pointing to known malicious infrastructure. The ML classifier also strongly indicated maliciousness, supporting the phishing and redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=cricket%20logo%20design%20template In PDF document text
    • http://zogonanumij.22web.org/pimedigeniludajuwegoka.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/CijPdSf/wigebil.pdfIn PDF document text
    • http://zikuwojanubeg.iblogger.org/i_10_traffic_report_arizona.pdfIn PDF document text
    • https://cdn.sqhk.co/remirokus/ifuDE1E/somilitataxenoxibexame.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/hxLjgat/cricgo_cricket_live_line_fast_live_scores.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376359/normal_5ff3df9338329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_600fda1b714e1.pdfIn PDF document text
    • https://wozalaro.weebly.com/uploads/1/3/4/3/134326714/tarifadagogabap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384026/normal_5fff42ac7bc21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaramapowo.rf.gd/16885422504.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/vamojuzak.pdfIn PDF document text
    • http://relumewamamit.rf.gd/android_pie_go_edition_rom.pdfIn PDF document text
    • http://figapow.epizy.com/adobe_air_android_games.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/target_market_examples_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/ministry_of_sound_clubbers_guide_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/31009536998.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_off0000fd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2B 5360 bytes
SHA-256: 4fdc693b62e21082a3e2a141ac6e12cad7c9e93566a9411c3adb52b44953a89f
font_01_sfnt_off00010f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4E 10724 bytes
SHA-256: 708476df842b2e73f06cb1558b55d49487743db98cc6e0ca918a4ae9f105112b

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