Malicious PDF — malware analysis report

Static analysis result for SHA-256 06edf8e41741d913…

MALICIOUS

PDF

76.1 KB Created: 2021-07-04 19:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 494b8d36a605d4fd85193c59c2d3b52d SHA-1: 1e726b9bdda9b43426e874099cf86ae5dad39e42 SHA-256: 06edf8e41741d913f897cdcb227d50264b5adcb544d6c8e12a2dc89f38bcdb1a
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple external URLs, many hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure suggests the PDF itself is a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd68af05c71---95421043134.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/11db163aee0532305b4b4d2f0be022af/lowanupi.pdf
    • https://activepymes.com/pub/file/sufapepunasofewudopex.pdf
    • http://gtshotel.it/images/file/soviposubofitatede.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4e619b411---42542594975.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16090311ede06b---fasulibex.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608259a7b93a7---56146498317.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3aa2c18e8b---45949155032.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/71999031774.pdf
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/51871470932.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d36b0a334d---bexit.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/6598f62f360e1326c6e24779d8003d1e/vadoxab.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abf13567796---vesewapasebubimoteben.pdf
    • https://alianzatours.com/imagenes/file/buveruzetodosenejafefev.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/7f38b7963cec10e393ee3f399383e317/xorejerovovagik.pdf
    • https://nationalshield-uae.com/userfiles/files/74402716485.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608debdf8e353---sudemo.pdf
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/veranejilipal.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/0eecbb4b9a2e6ae9fe175caff48dffb5/midelusuf.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/567a8b02e4a876e3315cad88ab2d3723/32592742459.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adddc1e833c---78458536974.pdf
    • https://giga-tronics.com/userfiles/files/gizuxep.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=purple+reign+by+future+mp3+download
    • 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_off0000c3a9.bin
2d6ada2ae0dee96287a442dd9d863352125fc15b23f37ec2e6c45f31cf0e2c0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A9 11284 bytes
font_01_sfnt_off0000ddcd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCD 16792 bytes
font_02_sfnt_off0000f5df.bin
458af0274d6d4ffbe5cbff264136a70c27ab7dcf8c88e142da6062fc82053222
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DF 17308 bytes