Malicious PDF — malware analysis report

Static analysis result for SHA-256 afee34589e42f0b5…

MALICIOUS

PDF

83.7 KB Created: 2021-08-15 07:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8a54ea7986d6b7f7d37f534e13e6ee0f SHA-1: 1e4a2fb9a117654052f296eabbbb7318b342de39 SHA-256: afee34589e42f0b5fdfafd5d5cf78604a1dbe02f76527125ce96a1f19d9bf33f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading further malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics, along with the ClamAV detection, strongly indicates a phishing or malware distribution attempt. No scripts were extracted, but the overall structure suggests a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083214b22588---45772675888.pdf In PDF document text
    • http://ateliergermain.net/sites/default/files/file/manevupokuronus.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16074081945a02---30369916655.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/76818145788.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/g00ktfdeqj0ks9n62756a6od0c/36938780252.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/cc748c42661c812822fe59dc535f6eb2/pisunelez.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/3eiv40q59jvh48ofbj8g1hi698/vuvuzerilogijime.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/3rnhv9ebcd32qirng5vt87ighn/34315148340.pdfIn PDF document text
    • http://ibb-online.ru/f/file/guwirilejepabufafigakaz.pdfIn PDF document text
    • https://preciseenergygroup.com/media/puzep.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085f0d34347f---vodiralegagomixiluxuxefif.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16073c38d4dfde---88540734426.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/6ae991d324c795d39e70124eb1e75f50/60300295738.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160818d2ad713c---48308276116.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/24081663965.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/cik7ikblaqfnj7grflc4b3tsrl/77921818279.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b1e5ce6b1---surunuvudipakiroxepuvamup.pdfIn PDF document text
    • https://ubitanduk.com/contents//files/gokimokijuwo.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/redupataxenurewabenid.pdfIn PDF document text
    • https://maturana.cl/upload/file/gejuxipajane.pdfIn PDF document text
    • https://kurtwohndesign.ch/userfiles/files/80249740673.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/feee60a3db9c39dcd2dc269810cc1baf/paveborit.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/fozalituxapogofejapuw.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/vuduzu.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/88917584311.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+use+wireless+charger+in+carPDF link annotation
    • 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_off0000e385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE385 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 17260 bytes
SHA-256: d0e56f03ff61cd59886196fb505a2dbbf63059a1fce2588c664b9559592347e5
font_02_sfnt_off00012815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12815 10684 bytes
SHA-256: 84ac69dd36c4feff53730f0ed66ef06ff83dd3c93d050fad6b2423d5ca1c8c18