Malicious PDF — malware analysis report

Static analysis result for SHA-256 f260e3a94b3a8541…

MALICIOUS

PDF

90.2 KB Created: 2021-09-03 17:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d2b024a05d10a645c740810e2c542b31 SHA-1: 89e5a0f358e3177f22681b7a1831d82974554a48 SHA-256: f260e3a94b3a85419aaaf0b122cc44cd9222abb8dc0cfcb69f504564ee7de64b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised WordPress installations. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=odisha+police+application+form+pdf+download PDF link annotation
    • http://www.addvanceo.info/userfiles/files/vefiletozitosodewutuwixuk.pdfIn PDF document text
    • http://sakurahoaanhdao.com/webroot/img/files/95483518611.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/14065500c6985d45cecb0c64b9bca670/44744257580.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/tasowerusubapuru.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e89d30d8cf---mutevixuwetuvegigiba.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210730052622.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/850e814a37a0e45aa6486e1fdb69eb9c/57079764763.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa6d1051fe---3333068022.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/01f7893117422243bef5dddfbc653b13/69463874635.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/basilelitafiporen.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609625d88261b---relufutoropoje.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbad3a7051---vikajanagoligudaxojiju.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/gixijobosojejelusoragelus.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/779eae4919ec7169cb72ee621306ada2/13428992410.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/36202537807.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cb5c76e37a9---rudumigupatanexi.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/m3r6rdc6ga53c5q35nfdg4phhaq8rf5g/tabakamazuvafizi.pdfIn PDF document text
    • http://terminsk.by/pics/files/60008335277.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/jasidar.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05609f3085---safiru.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/4761780448.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/5nj3p4b7ruaas9l1q1efqkeuic/67777564059.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/ruzawaxejaziwesofad.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD9 19076 bytes
SHA-256: 723f6b3228a1d99a8af758a21b14db4fc55bfa2d45f1c88b61b7132687c671e0
font_02_sfnt_off00013fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD1 10996 bytes
SHA-256: cf7ab899735bd27ae644ad64bfda74c98cfc2d1877630a70cfbf5c414fd7d081

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