Malicious PDF — malware analysis report

Static analysis result for SHA-256 609775744b2d208f…

MALICIOUS

PDF

85.6 KB Created: 2021-09-19 00:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b0ba9806aa802efd4a344a189c39bdeb SHA-1: 39a3b57e74c7498a990a711a8e570711d862d3dd SHA-256: 609775744b2d208fcb4136c4d80e91174ddf2c54aeaf05d652894fddfe880400
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier with high confidence. It contains numerous external URLs, many of which are part of link farms on disposable or compromised hosting, indicating a phishing or malware distribution attempt. The heuristic 'SE_QR_LURE' suggests the document may instruct users to scan a QR code, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=car+designing+apps+for+android PDF link annotation
    • https://jdrum-music.com/uploads/ckfiles/files/88313888826.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/74961086313.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/38999200567.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/bexewevajomiva.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/xenotuwab.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/53033650090.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/kr3oa69ut6t9jg3vtn40r2s7qd/40396265096.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210906052558.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/kiterenane.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/wazonikuk.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/zesofomoduwabeve.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/11354765089.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f71acf23c3---18055349326.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/2607254582.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/0c52lc9ddevjs80sjj0sbsmpm8/wufigojemilomemevuvopon.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/86014422440.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/22538714463.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/86631411262.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/tikavenukarogogabozenaga.pdfIn PDF document text
    • http://rinsacars.com/files/others/17875176.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/1266150430.pdfIn PDF document text
    • http://mcdanielz.eu/files/file/49178030638.pdfIn PDF document text
    • http://cellfruits.com/ckfinder/userfiles/files/buvoxupirilebexumum.pdfIn PDF document text
    • http://straps.by/ckfinder/userfiles/files/36251957576.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_off0000eb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB67 10560 bytes
SHA-256: 28be04b38ebcb926002808d4513a583d67ccaf0baddaa4522e26a79a9d62ba63
font_01_sfnt_off0001035a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6C 17512 bytes
SHA-256: 462b2ccea28827c7daacc2e30b83fe4cde6b01374fd67c098346bc431b156d7a

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