Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f02ad0df5be496…

MALICIOUS

PDF

82.2 KB Created: 2021-09-02 16:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 88b1bd1ab4c699c1442cdc23c41237fa SHA-1: 90a7d3b1fe837fa34608dec419cac0c30a980704 SHA-256: c2f02ad0df5be496570c960c0612f9248c980a3a1497c61a9fa81017fa495f66
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://codecs.roimages/file/bopomutafaxeku.pdf In PDF document text
    • http://seoulmenu.com/uploads/files/kulovoterumiza.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/d90999b72814a0b6098a8b3a87471575/duzimo.pdfIn PDF document text
    • http://www.moyekolodin.com/files/97146230894.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/jalirawufunusabirotan.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/9099837724.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c659d0d8e7b---vomijevekadenov.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/99004644538.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/bonevogemebitemoruranap.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/32948035725.pdfIn PDF document text
    • http://canoeing.by/pics/files/93270467904.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/nitetez.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/gonulewuruvirapidib.pdfIn PDF document text
    • https://cartolmania.it/file/94064231289.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/0310dc134cbb20cf59e75b3738bfa737/xumuxuzili.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4863843f3---bedusal.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/80878008465.pdfIn PDF document text
    • http://conroeclassof72.com/clients/d/de/de0acc14889d5d69ce6a2e221f3e79cd/File/sirezapepazikifebul.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/7f858a4f10e85ed37ae758a5538440fb/zepubizimawatarenujigor.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/96366174893.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7c857f2aa---gegubifimuzojiluvizum.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/kujogimuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=myers+briggs+test+results+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4B 10636 bytes
SHA-256: 3791647748600cd3d498f38ff86f2b95ac113ac010da867e6941634f6ac7e46a
font_01_sfnt_off0000f75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 17072 bytes
SHA-256: c9135469e4a1d5e32c1b928dc0061f2a4e4d356899f52115292399e34e29946b

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