Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b25882719cdbd8…

MALICIOUS

PDF

78.1 KB Created: 2021-03-15 14:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: aa2dfb32eeded3ab95312e8fd871cbca SHA-1: a43e16fd2381de2259d845200929325951dafdd3 SHA-256: 12b25882719cdbd8981ff56a33b18e34e7e5f0e37fa202d098220dce26b9a02d
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/award?keyword=bright+line+eating+food+plan+pdf PDF link annotation
    • http://boldly-grow.com/47336571281swknb.pdfIn PDF document text
    • http://topcreditcheck.info/11915605761sgsk8.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/xafeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410431/normal_5ffcd63c36975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453741/normal_602a8096cab15.pdfIn PDF document text
    • http://uaregroup.com/shatter_me_series_order_of_booksbctqf.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/81893191906f4maq.pdfIn PDF document text
    • http://doxedisipi.scienceontheweb.net/names_of_angels_in_the_bible_and_their_duties.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417536/normal_5fc578e284326.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/vukumesoj/all_iim_placement_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80806f9f-0018-41fb-84ef-de9d42b0ad0c/soundlogic_xt_solar_charger.pdfIn PDF document text
    • http://nerezusilanake.atwebpages.com/japok.pdfIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_7b8e3ae3c119429bbef785a96dc8f71e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47467a4e-7b62-4a6c-a688-9702a18606fe/how_to_use_qcy.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_9f405be22d00415db274b094b05ba4df.pdf?index=trueIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_c60bb6ce9d1d41fb90f99b2155a91cc8.pdf?index=trueIn PDF document text
    • http://nebojemesiwi.atwebpages.com/rolawezemozemiruzulosug.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/85287787497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77dfa7f4-4748-4c9f-9dbe-c03a2c957812/46595464606.pdfIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_717113dfe8b44306a4fd67f69b046f0d.pdf?index=trueIn PDF document text
    • http://bototiluwoge.atwebpages.com/project_planning_and_budgeting.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_off0000f32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32A 5176 bytes
SHA-256: dbc4a173e24905fcc3f7b01e413364f6d29a80027a310b5c131ba89145e0521a
font_01_sfnt_off000104c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C5 11316 bytes
SHA-256: c88ab977f01829bc69b0b1a88c41bf111c52103841c3d2f291b78d07a2aff5f8

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