Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf268819a4d6336…

MALICIOUS

PDF

72.4 KB Created: 2021-02-19 08:12:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 92c768982071db11ac14769e42ab227a SHA-1: 9b5a86395095c5a11ca37aa67da469b5c43dbbac SHA-256: fcf268819a4d633666be402f682bb83d5d42d6730dc3cb48c29ee7504c2ef2e4
126 Risk Score

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://baarspo.ru/123?utm_term=coaching+agile+teams+lyssa+adkins+pdf+free+download PDF link annotation
    • http://reduslimitalia.website/jafuraretidusaletevafig3snvg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_5fd8e20fb19e4.pdfIn PDF document text
    • http://snegny.com/bollywood_video_songs_free_full_hdjb26y.pdfIn PDF document text
    • http://xuzevofut.22web.org/14037445837.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367294/normal_5fe315f3c89f8.pdfIn PDF document text
    • http://diwolekeku.22web.org/classifying_triangles_maze_worksheet_answers.pdfIn PDF document text
    • http://kokilubowo.22web.org/60468315593.pdfIn PDF document text
    • http://fotogodopuxet.iblogger.org/12259839889.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/rakodo1956a.pdfIn PDF document text
    • http://mosdendy.store/warhammer_quest_2_walkthroughwfo2p.pdfIn PDF document text
    • https://cdn.sqhk.co/gimanoretev/jcjaaza/best_free_barcode_scanner_iphone.pdfIn PDF document text
    • http://lonewawojelos.22web.org/10773709652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_5fd23a3424d3f.pdfIn PDF document text
    • http://xobapadu.iblogger.org/gawetiwudafutevas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nugafafekovad.epizy.com/free_abc_tracing_worksheets.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/68185312812.pdfIn PDF document text
    • http://nuguvumaxexuwus.rf.gd/etude_in_c_minor_chopin_sheet_music.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_off0000dd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4D 5732 bytes
SHA-256: 5cce6c859ed8b58b94c6065e725388291a042458cadc64df6a6988440f8d3171
font_01_sfnt_off0000f0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BA 10544 bytes
SHA-256: 48969a26bca85e198609845b9bcef835b0847f210383d181c5ea5b72a5f73a12