Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bbfbeb25c9d772…

MALICIOUS

PDF

102.9 KB Created: 2021-01-25 20:05:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: fd6f4c60a2446e24e46a6f157c7542ed SHA-1: 738726413082fcb3b8daa5b56132388a50e142d7 SHA-256: d0bbfbeb25c9d772064a316754487af3c65cfc69a28fb34a191fb4349e8a46fd
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating it likely serves as a phishing or malware distribution vector. It contains numerous links, with at least one pointing to known malicious redirector infrastructure at 'traffking.ru'. The presence of urgency lures suggests an attempt to trick the user into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffking.ru/aws?utm_term=gmetrix+animate+cc+answers In PDF document text
    • https://cdn.sqhk.co/sejejajoxej/jjgeji8/nascar_race_sunday_night.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/4ihKSgj/dolujanunojolalidokef.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/jgekjik/easy_origami_halloween_cat.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hmbQgg4/dejaligav.pdfIn PDF document text
    • http://kikudesazogug.22web.org/40509377159.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/heNjdgT/jitelajitosejopu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/authentication_problem_android_wifi_sony_xperia.pdfIn PDF document text
    • http://moxawaten.epizy.com/formal_definition_of_conditional_probability.pdfIn PDF document text
    • http://funurebebepoti.epizy.com/28435359704.pdfIn PDF document text
    • http://dalonirutufitad.rf.gd/havering_sixth_form_course_list.pdfIn PDF document text
    • http://vowafipefazasex.epizy.com/75770650480.pdfIn PDF document text
    • http://bejopirobi.epizy.com/indices_worksheet_year_6.pdfIn PDF document text
    • http://rotaduwifomol.rf.gd/logajolan.pdfIn PDF document text
    • http://feletik.epizy.com/puppy_contract_template.pdfIn PDF document text
    • http://jogisav.epizy.com/barbarian_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/2782917936.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_off00015a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A7C 5104 bytes
SHA-256: 9bac3dc0c30130490596388977a6b17fc0477fe9597bde46cb62e419f627525d
font_01_sfnt_off00016bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BD2 10176 bytes
SHA-256: e071ab4a4e6983c10971ae5c45a7dd71ffeba60ed60e018373659f43c140c6e3

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