Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fab927296e89dea…

MALICIOUS

PDF

78.9 KB Created: 2021-06-27 23:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70b19122ad02b6fe1a2b06aec836df22 SHA-1: 17690ee2309e03e49931f9b13d26c3f8b934e809 SHA-256: 7fab927296e89dea6b15f3040d9bf1d1dbb5fc566ba7ace13319043255aedc5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The presence of external URIs and link farm indicators strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://vom-ragnaroek.de/uploads/file/46239222189.pdf
    • http://ahkjt.com/upfile/file/33322674265.pdf
    • http://dancedynamicsla.com/clients/38740/File/75394191885.pdf
    • https://brod-plovdiv.com/images/meret.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/s6n2jpnnqsglkot52u751i13qh/90950162212.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609236d794df9---40950101589.pdf
    • http://chataphan.com/file_media/file_image/file/56698906161.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d1d519052---mafotumojowusavaxadujo.pdf
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/85193344984.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bb540ce799d---rivuwatum.pdf
    • http://sungsam.net/userData/board/file/punurumuwizibiromeri.pdf
    • https://bilalyapidekorasyon.com/userfiles/file/25692075476.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c708bcdaf8---luwesekokakeko.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/754a776644cd54977b65a70dbc00720d/zeranos.pdf
    • http://ketnoikienthuc.com/upload/files/98149332588.pdf
    • http://www.allatpatikapecs.hu/images/file/96611169302.pdf
    • https://cowichanseniors.ca/userfiles/file/dozume.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/eeh7m6oc28j7g194a60ic8lfj5/91394808129.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/ea49e408ba4d8d0ed2f0e81e4bfa32ae/26972721431.pdf
    • https://langumeistras.lt/i/File/7599849607.pdf
    • https://agrolliance.ca/ckfinder/userfiles/files/33156555047.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=minecraft+for+free+android+apk
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d329.bin
0ad6b0e3e3550002ba37907326f4df6d1382154db62fd5d0d7261608f8edb5df
pdf-font-stream PDF embedded font (sfnt) at offset 0xD329 10484 bytes
font_01_sfnt_off0000eb1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1A 16792 bytes
font_02_sfnt_off0001032c.bin
476378def7bf62ea448b10bcb3cd52657b406a0799bd48bc10711b37ca6eb45f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 17144 bytes