Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc82f3febd345fa…

MALICIOUS

PDF

93.0 KB Created: 2021-03-02 06:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e8ace22ee012552df39f942e0e450a03 SHA-1: 73fe9ea11306e9299a562f41ab36585bf04f2f84 SHA-256: 8dc82f3febd345fa3b8e54afa521b708130e76224d4e9117132094c1b8fc375a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure, likely leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/strik?utm_term=how+to+do+capsim+round+1 PDF link annotation
    • http://razvivatel.blog/motezinevotorilabak6vg98.pdfIn PDF document text
    • http://opt15.ru/10841029867df56t.pdfIn PDF document text
    • https://cdn.sqhk.co/ropimipaf/jGXKCjf/paruzowowa.pdfIn PDF document text
    • http://vereffka.xyz/78411691616gtxty.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/gfjgjQ7/2020_election_polls_cnn_by_state.pdfIn PDF document text
    • http://sun-italy.space/miller_heiman_blue_sheet_download1b01r.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/Diejiih/36915424397.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/768215742047w4a2.pdfIn PDF document text
    • http://dream-stat.ru/gifuvugyf3c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387815/normal_5ff0a78bd8102.pdfIn PDF document text
    • http://bonboxstudio.com/31688735058lrf3j.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hchao7u/popokalisepafurebog.pdfIn PDF document text
    • http://ru-en.xyz/bncc_ensino_fundamental_resumonb04s.pdfIn PDF document text
    • https://cdn.sqhk.co/bepoweruga/jBqVjao/stack_overflow_for_teams_pricing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489259/normal_60113182ae859.pdfIn PDF document text
    • http://pollsexpert.com/sleep_tracking_apps_for_androidj56yn.pdfIn PDF document text
    • http://alcozerox.com/97876924719hsflw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385863/normal_5fc7b9d954356.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
    • http://lanikudawojag.rf.gd/26258577246.pdfIn PDF document text
    • http://zegaruso.rf.gd/51659360345.pdfIn PDF document text
    • http://punejiva.epizy.com/gm_socrates_help_desk_phone_number.pdfIn PDF document text
    • http://gilaniborifavap.epizy.com/autonics_proximity_sensor_datasheet.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_off00011fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB7 5056 bytes
SHA-256: 09e1f8a3c80a6b15e6740ceb4bf8272b0398f8d1e3edad56fb49598fc98423ac
font_01_sfnt_off000130d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D5 11632 bytes
SHA-256: 80e520ea09c8030ec32b42c8867581fad52dad7ec6d77f25b592b75d77d60738
font_02_sfnt_off0001587c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1587C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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