Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d233c99ab13f9d8…

MALICIOUS

PDF

86.1 KB Created: 2021-09-06 20:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ebe57430ddc228457418be13833eb85c SHA-1: f3d789875cbb0993b3ff315e368f431c95447fd0 SHA-256: 0d233c99ab13f9d8bd94a89794e2efc26174ae05b5ee7f0c4188866dce07ef0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites and disposable domains, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the presence of numerous external links indicates a likely intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://catamma.ru/uplcv?utm_term=subramanya+bhujangam+in+telugu+free+download+pdf PDF link annotation
    • http://epoxidice.ro/mm/file/wepivinalikaw.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/992f322c63a563c00ce669ef131cd01e/nijik.pdfIn PDF document text
    • http://premiumdrinks.eu/userfiles/vexodekamolujijosudivob.pdfIn PDF document text
    • http://e-hematologica.pl/users//file/fapibagidokegegurepo.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/xomelerugumerupujavawig.pdfIn PDF document text
    • http://chinazzjx.com/d/files/4122911086.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083caa454521---nopufipexijovekepidiwem.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/14ff5af38e54bcb53ceaa116e398cf6c/lizonotawul.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160849eede8723---konuxixobe.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b505263fdcf---suzapaposo.pdfIn PDF document text
    • http://ducthanhtam.com/uploads/userfiles/file/satuw.pdfIn PDF document text
    • http://chinalabware.es/d/files/91464294559.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6a1474757e---54047415640.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9622f4032---jalasupotegekavamugarazub.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6ce38080971303d98200805720ab0c9e/83587677538.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/wesotobetijozalolasowur.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d92551cf9a3---mogapimirazopatedovip.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/6e02eb6c33313aba8496bcc4e438fec0/89001592327.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/d9550b644064ca903aae995e267d8984/80848889032.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/42137809907.pdfIn PDF document text
    • http://climtech.com/files/files/32907114057.pdfIn PDF document text
    • http://sequoia60.com/clients/875776/File/42489623995.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/16900392830.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/37167564611.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ouril83ri7g1960ff454m4uoab/belose.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F5 11424 bytes
SHA-256: caf3a34935bd940671f38d3055c40a57986b4fc4f793bb8d1a045716ccf38cf4
font_01_sfnt_off0000e056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE056 21412 bytes
SHA-256: a868f2e323a2d7f3853cf16c7a71c633c7e70b2083de33094d3d4272e58396a9
font_02_sfnt_off00011917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11917 16348 bytes
SHA-256: 7d9e18774d7ef079e29216e183dee4772ec9c85d29a7465ac912d508f04d8666
font_03_sfnt_off00012f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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