Malicious PDF — malware analysis report

Static analysis result for SHA-256 962d68a83b763567…

MALICIOUS

PDF

84.7 KB Created: 2021-04-08 08:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ad9e12e99587e1984c4f9444c9e81f21 SHA-1: 53d737b7155e3e7b10a5b6e11541431633fcf519 SHA-256: 962d68a83b763567d9e6ede6754dc0aa1b1bb01546bb7ca70a9250b4e654e49a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 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://jottigo.ru/wix?keyword=acheron+libro+pdf PDF link annotation
    • http://begemotiks.fun/239461838460e4i2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_6040384dd9e58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_60380d2abeafc.pdfIn PDF document text
    • http://topvideo.design/dapigezepesataniyk71.pdfIn PDF document text
    • https://sivabukejiwija.weebly.com/uploads/1/3/4/4/134459056/zepufemidap_zibeguvabupan_betuw_wolip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_604f49f8175ab.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/Thhjdhe/87675166540.pdfIn PDF document text
    • http://pe50off.pro/114128223884fy0q.pdfIn PDF document text
    • https://nalirukixew.weebly.com/uploads/1/3/0/9/130969663/6600001.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485591/normal_6000a3b4de67e.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/h5w2mji/streets_of_rage_4_stage_1_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_f9b6706e20fd49be8cc8b9418f1b2cc6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/the_significance_of_theory_terry_eagleton_summary.pdfIn PDF document text
    • https://f7b0ef4b-317e-4f07-901b-4de91a029b50.filesusr.com/ugd/50f142_f1d54d37201547b0ba71b26404edf830.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/palevijuj/assassin_s_creed_origins_trainer_1._51.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_off00010d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D74 4984 bytes
SHA-256: b8dda1386a80f6fc9f07d34ceb0a7438a7f90e9bcfa3590c89cb375bde4c17d7
font_01_sfnt_off00011e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5E 12028 bytes
SHA-256: 30099151bd35197ee5fa3e884053577167fee63b3c5da84a51e6130a92b52dcb

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