Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ec2816a31f086d…

MALICIOUS

PDF

77.4 KB Created: 2021-09-04 14:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 29c6a135cf51aa9d4af7c095d0d02f51 SHA-1: 573ab18ed9fe0709984fdf08ed774f8b758bdf00 SHA-256: 22ec2816a31f086d59a046c5da9234b0f82e086b100fead939eb2eb298580814
156 Risk Score

Malware Insights

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

The PDF was flagged by a ML classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple links to WordPress upload directories and the use of 'utm_term' parameters suggest an attempt to lure users through search engine optimization or deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/26957819711.pdf In PDF document text
    • http://epwuae.com/userfiles/file/nakujugiwusim.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/kajunagadup.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/vozozilimibaxizufaj.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/51788422228.pdfIn PDF document text
    • https://aaaxxion.info/images/file/zujarusufaxopumapuz.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ld71amcmb7ubt0e768cub3vauf/tulojexezawisejapegasid.pdfIn PDF document text
    • http://webs123.com/userfiles/file/xopenexater.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/kfauqhdgodh4j335krs5osri99/28323701500.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/18228044912.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/76133266104.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16094555c3e97d---51444383678.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ae02719b50---61275224059.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1609d234ea655d---56416927362.pdfIn PDF document text
    • http://peeweeslearningcenter.org/clients/5/54/545fcf94abc6bccf175f3035c740e6d3/File/74226508967.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/78245576549.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/ruvafojediwi.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/76965679516.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/ik6cgb1c0ocmojqenv5t06q2pl/22115821234.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8aff84a59---20868936734.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8f1e7f3e2---jovijome.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/30219096592.pdfIn PDF document text
    • https://5y1.org/info/copyright-mcgraw-hill-education-answers_1_4de994.htmlpdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=glencoe+mcgraw+hill+worksheet+answers+for+sciencePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA7 19860 bytes
SHA-256: 628e95a91ef1a892c7e64b1bd2efa65165e401569bf6b8cc1b197565721e3da4
font_01_sfnt_off0000f466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF466 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7D 11000 bytes
SHA-256: 5343de5c4ae30142dc3db176de0a9e035f3673fd8f97a2157bbbd390c4383cd5

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