Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57d9e814be47330…

MALICIOUS

PDF

87.1 KB Created: 2021-07-01 19:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 710c18066e0601073d3162f569fe8c12 SHA-1: 4122efc1f23d57d782a61454681b6bd11c794642 SHA-256: d57d9e814be473308b70ba13d88eb8267110afb90ff5252ff0b4d9bf81767969
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 a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and disposable hosting domains. These links likely lead to phishing pages or further malware downloads, indicating a clear intent to deceive or infect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://smidgel.ru/uplcv?utm_term=project+diva+2nd+song+list
    • https://nepalipublisher.com/ckfinder/userfiles/files/13679123868.pdf
    • https://wagaskar.com/media/pikawifokukosigubivevo.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/7c0cdea04825108d14e6a034cf9b2b62/21129319391.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/rm2afr0n3e3t4aaefi9a7tr0h4/50026379982.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/0f874a9180000582b1f8776f68932754/jomofigupi.pdf
    • http://quickvideo.nl/userfiles/file/zusenexelagemem.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/3e5a3ee4316da1e80cd5da9147298cb4/40834841964.pdf
    • http://texmet.pl/userimages/file/76669845032.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d45cc6196---jinuw.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/f0226fac2f77e6effd7407270ffdfa4f/xutogonosaxisi.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd0ed3cbe---37828611893.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16085f0b2dd90e---lutepuxowi.pdf
    • https://powermailer.in/userfiles/file/4929160731.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095db9f253eb---dumuniwawiberuxodad.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/genamawuzitij.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8929848276---poxoganugimunovivefuz.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160870c0c4d6be---50694328642.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/292329e3bf606a2fdd0617ee21aca8f3/41405328243.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160819e26e0d47---dujatiponovexi.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16087721b913d2---98274890647.pdf
    • https://vieclamkinhdoanh247.com/upload/files/loxovafagidefezevozes.pdf
    • https://allcreaturesinc.com/files/files/putofoxanibu.pdf
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/tukapo.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/55a3774dc4b953a78619eec03067c8cc/noziwirewosiken.pdf
    • http://yi-xiang-yuan.com/CKEdit/upload/files/71305485740.pdf
    • 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_off0000f1a4.bin
d85ff00d3e72b902b1e343dec323a7730c1e61d5644fd073ed199290c5bbadb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 17112 bytes
font_01_sfnt_off00011e16.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E16 16792 bytes
font_02_sfnt_off0001362d.bin
3e68bb0777214762f05ffc90dc48ddfc33265aedb2b5a28708cab505dce66034		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1362D 10864 bytes

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