Malicious PDF — malware analysis report

Static analysis result for SHA-256 254b1245b972696f…

MALICIOUS

PDF

96.4 KB Created: 2021-03-08 19:17:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8bbb2c922a4e1be9cdf26209810cca37 SHA-1: 2e770b96a38b66be3e245bd7bfcec475afe353e7 SHA-256: 254b1245b972696f6fce62f45d02b89487accba7a4edd36b4f758769e120b995
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 0.9997

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://baarspo.ru/strik?utm_term=data+communication+and+networking+powerpoint+slides PDF link annotation
    • https://cdn.sqhk.co/wexunaveb/jjiaLPC/xatunowozakavunilamado.pdfIn PDF document text
    • http://nonretloli.site/98559376813qj8gb.pdfIn PDF document text
    • http://vitrinachel.ru/holmes_air_purifier_good_for_smokev9w3t.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/yjehdRt/unicorn_dash_mp3_songs_free_download.pdfIn PDF document text
    • http://yandex-delivery.cc/41207838650r6sre.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/cxcJBHq/35253254816.pdfIn PDF document text
    • https://cdn.sqhk.co/kefofepobam/gIhh9gf/downloader_for_tumblr.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/jjzhcTW/voice_recorder_not_working_on_iphone_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_d5e3d493da674d79813da96a27b85369.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figidireki/sofibawesefedije.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/pafonimekuxabanadewu.pdfIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_e1771e42bb0e4d82af173d1be82752a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/debijoki.pdfIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_b8b1c419d399435ba3114b860c64511a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nigimul/online_accident_report_dubai_police.pdfIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_45ead17d8c5e4647a2fed6885c06be54.pdf?index=trueIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_3ee29d7ddd52414e8c005bccdb19ffc8.pdf?index=trueIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_25a04f65761042ecaf8b2001223530e3.pdf?index=trueIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_63d6f56ceb8f49598c69805ed38a8b47.pdf?index=trueIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_e59e593b815b42c3a0c36b7cb8880e70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mogedozara/sermon_outline_on_peacemaker.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C06 5548 bytes
SHA-256: 4eb104ff06a3b1ba5eb8c467ea3ce31ac5b7eb099197b9137a50d0751300e4cf
font_01_sfnt_off00014eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EEB 10916 bytes
SHA-256: 8c8585a16c60292e1133e03b2ce5f6fc3ace8cabc5d690b5910182f5fe9bc5c9

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