Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed454645646c8818…

MALICIOUS

PDF

86.4 KB Created: 2021-06-27 20:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fad20640e5cd08faa6891d3071d5e341 SHA-1: e01f45ca2feee021fda8b386972514dfc0e8db23 SHA-256: ed454645646c8818337783b2a4038313bd3018ce27321bf89a60450b698e6295
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute phishing content or malware. The presence of numerous unknown URLs hosted on potentially compromised infrastructure supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23f272bb3e---61240338705.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa34cf37d89---45347690454.pdf
    • http://gtshotel.it/images/file/76742613559.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087dd1fe70fb---lemoxisesotowan.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/5bg6g3n20h1rs7cf6lmg8mkevi/ninoberugopus.pdf
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/terun.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/2f6ae450cef0041788e555ae7559e57f/xabudizazi.pdf
    • http://washchienluoc.com/upload/file/rasaxidesuvatov.pdf
    • http://ithaca1962.com/clients/41687/File/69921334092.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/3baaa644dc5885213e61244f4db2744a/dumubejowopow.pdf
    • http://anatolianlgs.com/userfiles/file/ledaxulozimerunumojata.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/07g0n3039310ptaiplto5qessm/55396795041.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/99pi3tfguu4nqtnh0bs5fpntu3/gebak.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0a79c652a---lepawi.pdf
    • https://eseninternational.com/uploads/files/39791370193.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/nelexi.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/cmjj72a3bm6t4qhbk0dfbn0mhf/63509734156.pdf
    • https://yepsell.com/userfiles/files/refozupujadumewe.pdf
    • http://riskhedgetech.com/uploaded/file/109331365660abf64eb7cf0.pdf
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/sipamujogejupij.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/1sk4dddm58btlqroqbvkbhria5/kivasuridon.pdf
    • https://fablab808.com/nbloom/fckuploads/file/guxodinesudupataj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=something+just+like+that+mp3
    • 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_off0000edee.bin
dff82e32568c661787bb779a6a9fbaff0001694aa5a554923959198d8f371d3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 11168 bytes
font_01_sfnt_off000107d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107D7 16792 bytes
font_02_sfnt_off00011fe9.bin
244996c5d89759855ff329db511716ffdfc74bc9b515670891fb136ef9083a65
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE9 17072 bytes