Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f532cd140fabc9…

MALICIOUS

PDF

81.2 KB Created: 2021-09-05 12:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8d85df1e0928516627e0e948bf3849e5 SHA-1: 261004c7e2069a3e34a9e1056ea0cc4e1f1f53b3 SHA-256: 47f532cd140fabc9d81a4538a1b304de56a1025ebe5ff545407677bea14963b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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=transunion+dispute+form+pdf PDF link annotation
    • http://ancheng-medical.com/uploadfile/files/fomobulapas.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/27718964415.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/d1fab6c9ovp567dm18pb154f87/89544447693.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/kaketilitemelirifot.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/43201096082.pdfIn PDF document text
    • http://neteyes.eu/editor_up/wekamusafojevu.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/65583060285.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/703c56c3f70c64b415511f254469efad/71607442999.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/kefikezidabolegexe.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a468e0ac1e0---64883473773.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/60325014784.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/78757305450.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/68707625736.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a751119a5e5---10374133105.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/13182921489.pdfIn PDF document text
    • http://riph.pl/userfiles/file/59936194584.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/depoxep.pdfIn PDF document text
    • http://boldogelet.hu/media/rajuvaki.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/mudobi.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/wonomobiresenolowu.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd940f1cb7---1922378188.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/56978046655.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/f9f2856fad9babe33404296cc725670b/boxerajuk.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85b1a79621---41380588515.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ochpplc5ea32nj7psdcs0q4e5n/kugemevewomofuwi.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210807051604.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_off0000da51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 17232 bytes
SHA-256: 72ad9badbdeeaef711a846069910cebdf772deb7bf02fa131e74af7033d7cc1a
font_01_sfnt_off00010691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10691 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA8 10676 bytes
SHA-256: b0a30a78ceeef6e97eacc6b430d045ecaaf93ff2b59969fc723fbffe56bccae5