Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0759081ad6b91ff…

MALICIOUS

PDF

89.1 KB Created: 2021-07-08 01:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1342c35e6bb6992ffd4e5177c13b01b3 SHA-1: 01ba9ff3bd94a85f3039e64477b7cd91d0f36e48 SHA-256: f0759081ad6b91ff58b921ae34c4097231699e7a8eedce061582cc32117fb5dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely to lure users into downloading further malware or engaging in phishing activities. The presence of external URI heuristics and link farm indicators reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=moving+coil+permanent+magnet+instrument+can+be+used+as+flux+meter+by
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609284fc6b867---82097512661.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841676d67c6---59386473359.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/6fb91b922f2f72c0bda9316e57689577/fujalagudaje.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/adb2c22f3e7dd1a63019a9fb1472a765/bazewugeg.pdf
    • https://global-product.org/CKEdit/upload/files/sevenadis.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/e07496fa949ede8b9e8ea3e1e943a78f/kogopijud.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b662e57781---jijominikawagesojap.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/b48ea499ffc5873a1e3934566b658827/14889616275.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/180406a328af70a70882b5d7e05123d9/70887728625.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/492d928d692be0eb04e4433adba000f3/3103607268.pdf
    • http://abnicum.ru/files/file/87306658876.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/a6f1em3j7fkvl5nsehold871q0/vuvixawavagegokutaditu.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac03f6c033---mewexekowotivawevutakopi.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/bs8bkfmeuiagjjd1r3m8kml88e/11107888861.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607950bf03e1c---89640897597.pdf
    • https://aashianarealty.com/file/kamubo.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7c6cc4bea---zisiwatizasevaxuwok.pdf
    • http://alexlunacoach.com/img/editor/file/vigajajiparidabovexenav.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/52b7e492eb200877488face429c82699/73348577214.pdf
    • http://saipanbooking.com/FileData/ckfinder/files/20210629_A766C4909C29C5B7.pdf
    • http://stepasidemedical.com/images/uploads/file/25154177607.pdf
    • http://fsoa.cn/userfiles/file/suxodidesanodesexuvagif.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bd78db3f5---45748797606.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ccd424686---87218343618.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e38a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE38A 16792 bytes
font_01_sfnt_off0000fb9b.bin
505f1f16fb057e2a34e7666bb0a43a50f2e0b7bc0033e59b70183295ac12d2e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 16100 bytes
font_02_sfnt_off000110d3.bin
e628d602469bc86c77425fa7dbe966dd7e099c065ec5fbfdb999ee96750830c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x110D3 16340 bytes
font_03_sfnt_off00013b25.bin
5b3527fdebaafc340627cb7a7a04108a21e35b3bfb458107cf81fecdc4e4b52a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B25 11476 bytes