Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a2f0ec582288ab…

MALICIOUS

PDF

216.5 KB Created: 2021-07-03 15:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41d2f63a379fd0ef9de5721c8d9d47ec SHA-1: db7d07f713ee9d6fa906818b748aa073cd17b37f SHA-256: 62a2f0ec582288abc68914f1e864b22720691f3a1921d371c53e9c031df01b30
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of a 'link farm' pointing to compromised WordPress upload storage suggests the document is designed to lure users into downloading a secondary malicious PDF payload. While no scripts were directly extracted, the nature of the URLs and the 'compromised CMS upload link farm' heuristic strongly imply exploitation and potential phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 5

  • 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.
  • 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://www.fonfe.com/uploads/files/88441050723.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609452eaea11c---45396692225.pdf
    • http://xn--b1akwe.xn--p1ai/userfiles/file/nifololo.pdf
    • http://thedewakohchang.com/image/upload/File/7410097190.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdf3ae659b---51532212353.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/a2ddc2581d3b7d66b1069842617b4218/3782499257.pdf
    • http://wannawwannie.pl/userfiles/file/58590381059.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/672fa8daeba29993231f004d263c1a0d/ravenuwonopubaw.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160ddab4a718f3---suxepitamagurisiba.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/8o0dtj5phu3vkhl81e39so29u4/mapobug.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/4b19e52688f632d093736418243f139d/5256488798.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/f336b1d3ee4c6f9e4809270fdfc3892e/63299497665.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16089d81c50f79---24970552422.pdf
    • http://classicalgardenstatues.com/uplds/file/neweruzeg.pdf
    • http://driver-jazda.pl/upload/file/gokajavewufof.pdf
    • http://oletrans.sk/editor_uploads/files/83928005583.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2070a981eb---xajejomerixanusekim.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/3573f837e8599fa9803b692d39cc81e0/64273769029.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/9ce1184f39a23842f51e92dec1afb0d2/91055748414.pdf
    • http://world-green-hope.com/uploads/files/tuxuzisigezuxekapiwoned.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/shvokck1qb48a0p8774ua2veg0/raruziwiwuv.pdf
    • https://stillwaiting.org/userfiles/file/walutarizuxidivewiril.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=polydactyly+in+animals
    • 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_off0002f43a.bin
28fd8440f0fc85f32f6de56dfd4b321ba69d3de964b7be59c256d56086e9092b
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F43A 10416 bytes
font_01_sfnt_off00030bcf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x30BCF 16792 bytes
font_02_sfnt_off000323e1.bin
091f769270ac646f4d8b3f8facf208b6550fe9b0c40c6db8d59b1e12086e8ec9
pdf-font-stream PDF embedded font (sfnt) at offset 0x323E1 18264 bytes