Malicious PDF — malware analysis report

Static analysis result for SHA-256 baca033eed054f3a…

MALICIOUS

PDF

91.9 KB Created: 2021-07-01 12:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 490b6e62d8a00010aa56b7aca8322617 SHA-1: 9d05973fba2e0c64749bc80dac950d3291ff9baa SHA-256: baca033eed054f3a411a62631515368abc986085acf7cf9a93716094ccca9c63
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple distinct hosts, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external links, many on disposable hosting, supports the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://asbazainville.org/userfiles/file/rukazimukitevegulekokan.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/fag3paorbe0qms1pb3o06i0obo/85422589266.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088f1deb80c3---tekuvokozogi.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909afa3f7d2---70374070999.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/796289ba568d5aeebfaef99150ee94a7/40352095098.pdf
    • http://flygarfield.net/userfiles/file/zitezoloz.pdf
    • https://codecs.roimages/file/kewafobinabokovopabinov.pdf
    • http://multi-accueil.fr/ressource/site-image/files/ruluwemozuwenazik.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/gbmepvape9ddmr7tpqckb9dp4c/menudezenusedasi.pdf
    • http://wittlich-luexem.de/userfiles/file/wogezinapodizumerum.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607290dc6928f---jenukoratigufezoluz.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/5ebbee0880888cb54523ff1796610c9e/telidigosi.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084c9c04ff24---77979785219.pdf
    • https://bmw-zona.ru/uploads/file/34028658557.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16075aaff3009a---tenilobujuwifatido.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c147a3667bf---80975492060.pdf
    • http://indecomavo.pl/inc/88205993981.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/57368788093.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/el6vcnkqo5b0q2sqaehf46diss/55505118621.pdf
    • http://thaoduocquyhiem.com/userfiles/image/file/53281720838.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfda3c1017---karovi.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7943851901---7854910870.pdf
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/33882002102.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/07e8ae1c7b2accf1c6575024b2f686dc/9015018175.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/064f78dd1d67a29fb6dd86d26904225b/zokanazeranekulot.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+long+does+a+cervical+disc+replacement+last
    • 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_off00010354.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10354 16792 bytes
font_01_sfnt_off00011b6b.bin
371384374da39be5e46365d93a00aebc640ccd1f0a25d0bb6ae0925ca33495c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6B 11000 bytes
font_02_sfnt_off000134ce.bin
03dfbf03d86dc38ae4b2e371bdc538e00fdc81d5e6dc98e2e10c80978936f80c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134CE 17256 bytes

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