Malicious PDF — malware analysis report

Static analysis result for SHA-256 8287f198e7b04452…

MALICIOUS

PDF

65.8 KB Created: 2021-02-23 07:47:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b241245232336f54d345ec47a9dcff3b SHA-1: ef5b42704283609d59e0e93243f6c70bbd6a1c95 SHA-256: 8287f198e7b04452fcff17ab1be1e00f003c6c51f8010712fe4e18a9a27d6075
156 Risk Score

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. 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 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=fluidmaster+300+manual PDF link annotation
    • https://puxodupewuna.weebly.com/uploads/1/3/0/7/130739405/4ff933e12a8f0.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/yhdUheb/25040761896.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/gTMThf3/48569892875.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/jepozopuz-bojabu-lagoga.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/jepjf0q/butidizumefune.pdfIn PDF document text
    • https://kekugijofer.weebly.com/uploads/1/3/5/3/135321092/1936197.pdfIn PDF document text
    • https://cdn.sqhk.co/gitaligido/Cfhdbgi/pawubebuxowizorexekoj.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/hfjfwic/sad_ringtone_download_mobcup.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/gfTjhMf/18376239708.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/J6Ohf6D/92087201367.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/eVgpAja/51817723646.pdfIn PDF document text
    • https://cdn.sqhk.co/visobipibe/5gjznnl/stomach_pain_constipation_ibs.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/3tyn8Xn/tuzufavi.pdfIn PDF document text
    • http://sis-paypal.com/gun_safe_reviews_consumer_reportsgv29x.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/Eiciix0/gukosesoz.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/9SihE0u/60235323302.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/ihvje91/mikemokixezivijovurona.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/hghhtAq/warzone_bunkers_and_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/mowuseparap/c4h7jhY/18237556786.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/iVOKQQa/kitepipegipuli.pdfIn PDF document text
    • https://cdn.sqhk.co/lijedubejop/w3ieVhh/maze_ost_the_king_eternal_monarch.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/ijjdjaG/novimibaliwugedefifi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 8

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_off0000c589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC589 5232 bytes
SHA-256: 3c0fa80518228d9b65980ba7d280c7142f91f53e46950310011c9e0ce7c07d98
font_01_sfnt_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 10208 bytes
SHA-256: 27732b98321993f391649300aa7434911c0e4f81f2ffe47d29387365449c4200

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