Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e320b0a1fdd7b9…

MALICIOUS

PDF

81.3 KB Created: 2021-06-26 05:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b21d02b281e59c36c3c3f56fc2a66aa SHA-1: bc8823665a71d93ead98904bda447e1d5768e2c8 SHA-256: 08e320b0a1fdd7b9fc7d24eb58a2237f283659ff09273a8a284c2c1ca7e631bc
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 and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/rje0r7fdbnno7djieg5m48gee1/mapimuno.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608897c5ce6bb---22554063783.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/8527ee49b5a7e4485b9e68894ac2b038/70438633789.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/bj2dijpjaisv8rfoke54lu8u24/kowinupuxijo.pdf
    • https://planet-for-events.de/userfiles/file/18619826776.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/60029912629.pdf
    • https://divinenine.net/userfiles/file/4487240152.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/kr2m7sl11b0hch9ti2mb26ef4b/fisevekewopewo.pdf
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/95778117002.pdf
    • http://peaktoppet.com/ck_imgs/files/popivazex.pdf
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/46872614406.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac0d771afd---60718790363.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a740a23938f---mejebajireme.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/5851d624c36fb8da0b0ba384a43ae38e/8049061299.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83002607da---11556424906.pdf
    • https://baptistfriends.org/media/97608539938.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/2ms3222pd87vav8hvrmjlrvv12/vuxuz.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088db2517d24---97918492427.pdf
    • https://smithsgame.com/calisma2/files/uploads/65456629140.pdf
    • http://tuzvedo.hu/elemek/file/88557787915.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/ec4159eaaca1d5c1d3f855807dd7a078/wuxebal.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607312de8c892---18739888750.pdf
    • http://china-miyaco.com/img/file/202161205953.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+many+milliliters+are+in+0.020+l
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c42e.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC42E 16252 bytes
font_01_sfnt_off0000da0a.bin
e4e59d858a133ca3de672ba58b42bff7ebc8ecfb45e197bc75b549314989a305		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0A 16528 bytes
font_02_sfnt_off000104de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104DE 16792 bytes
font_03_sfnt_off00011cf5.bin
77521bdcaae648d906b660e916e48a11e6de51b78a14058b171e26485b8425be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF5 10768 bytes

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