Malicious PDF — malware analysis report

Static analysis result for SHA-256 46affe8e1d37a25b…

MALICIOUS

PDF

166.5 KB Created: 2021-03-23 18:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 88b4531f1dc75d340ad2b5a58594822e SHA-1: 2d88ba4a55de05e14f3c30beb728f3c382af15f1 SHA-256: 46affe8e1d37a25bc447b603d5871b857dfc608bdcffe22f3f001c41fcc43aec
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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
  • 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://bologen.ru/strik?utm_term=what+state+has+the+most+human+trafficking PDF link annotation
    • http://afracheat3.xyz/mekeresogovuxae9q3l.pdfIn PDF document text
    • http://bit-ipo.ru/wilegatikexufosukiveg1h35.pdfIn PDF document text
    • http://siondez.ru/zubororuvej06que.pdfIn PDF document text
    • http://reduslimitalia-official.website/earth_now_app4xmaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_601f0ccbc9b81.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/14051840325ltrq8.pdfIn PDF document text
    • http://skywonder.space/request_copy_of_police_report_lapdn4qb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464735/normal_5ff7a089c560c.pdfIn PDF document text
    • http://biomaniks.website/how_to_get_minecraft_windows_10_edition_for_free_1.16.40bu8n7.pdfIn PDF document text
    • http://hookup153.space/gatippbdim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406777/normal_5fcefe37e3e61.pdfIn PDF document text
    • http://juilopkiretlo.ru/zagetoloqy82j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_5fdd5b4781280.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/375c3578-0049-43db-b71b-445006b78f74/probability_and_stochastic_processes_3rd_solution.pdfIn PDF document text
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_992f960f284d40e282f45f65790c24bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/589e9b94-e7da-424a-b23c-9d5e53935c6d/44976276725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c871c1c-094b-4bfa-abc8-6613b2602c14/how_to_reset_kidde_smoke_alarm_after_changing_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff960eb1-e66b-4a42-a0a2-0168a4c3251e/kibiwijixolidesenifuk.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_0da8105fa2d54497a31d208d19eb8dff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b3614fc-35ff-40dd-ab55-b70eef25394e/why_is_my_breville_toaster_blinking.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_off00024e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24E9E 5340 bytes
SHA-256: 45545689b453a3bd5a52abc20d12e0b8f4037dce59724e96767537ad8d850fff
font_01_sfnt_off000260af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x260AF 12972 bytes
SHA-256: f94d3fb5124e592cb41eff42b0e3780aec10e317241363e46a6916cbfba8923a

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