Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda7f7fe3adc64d8…

MALICIOUS

PDF

67.0 KB Created: 2021-03-30 13:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3f3b06b269547a019537e1b60acfb191 SHA-1: 42bbbe0e3bb372bfb1a27241d834a5743d81b905 SHA-256: eda7f7fe3adc64d853053068ac0d59ad875d47281fe4a4a51dad1d34cffcaf0a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by heuristics as a link farm on disposable hosting, 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 spearphishing attachment designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/123?utm_term=arcscene+software+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5fe95fc33fbc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468572/normal_6027cd2a9dec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491688/normal_605d9775b3b27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427820/normal_605532dd2c469.pdfIn PDF document text
    • http://tulumiv.medianewsonline.com/muladefexefukewiwi.pdfIn PDF document text
    • http://1xbet-football.fun/kulegorotiuom24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385028/normal_6011a5ca9bcba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497650/normal_6017fa8a3d044.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/pinusuvawiburizufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_6030d569a6a3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421329/normal_5fefddf5de60d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_600b6cd2ecaf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_604f0c526b9c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466676/normal_605c600595daf.pdfIn PDF document text
    • http://pmaider.com/17697843909b6tvf.pdfIn PDF document text
    • http://ionatr.fun/harry_potter_2020_gameorb49.pdfIn PDF document text
    • http://fitokapss.xyz/37347142151fo1ak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dasuxasad.rf.gd/the_48_laws_of_power_robert_greene_full_audiobook_hq.pdfIn PDF document text
    • http://wewodato.epizy.com/nikalosabomotekogutopukaf.pdfIn PDF document text
    • http://vowukexakajan.rf.gd/65669780139.pdfIn PDF document text
    • http://pakapenabu.atwebpages.com/88745225565.pdfIn PDF document text
    • http://demunoj.epizy.com/95596223454.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_off0000cb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7F 4924 bytes
SHA-256: b236ee000eedd02562065da12acac50fe800a401ee9cabdf882ea66751e1e689
font_01_sfnt_off0000dc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC65 10224 bytes
SHA-256: b71becaec69c7c4582db7c2f2025c145a8981e8ad823b0321c5d40dfb489e3c4

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