Malicious PDF — malware analysis report

Static analysis result for SHA-256 807324827db2882e…

MALICIOUS

PDF

84.1 KB Created: 2021-08-16 03:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e0ac142a7737bdd5f3861e938dfdc180 SHA-1: 236c9c798509939225fc6766f2881c976ee6952e SHA-256: 807324827db2882e5346664d412acd43080c3f7c4997a33420b7ca0f82c9957e
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the heuristic findings strongly point towards a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=kinemaster+diamond+apk+download+digitbin+2021 PDF link annotation
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/e6e79f7f693c37f71c225ccf2e629f1d/46088888389.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/75838068796.pdfIn PDF document text
    • http://teplospectr.ru/images/files/lukowewinirilifejija.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ca99df36f---puluxa.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/8535b6157cacf556dfa4f545cf0d5e10/wapujogudemi.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/duxolisisovud.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/ke7g8shb9re46d5dodnot4oml2/kimowow.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/kixewaretutusu.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec8a447dd4---11524759390.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/jenevamimixemimekamitipu.pdfIn PDF document text
    • http://www.farmaciavictoriayjmleon.com/userfiles/files/laguliwe.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a864255fc63---topafug.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1609d20d60802e---vinuxojenojalibevadole.pdfIn PDF document text
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/36831044970.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/3d7d1246192ba72ff1c82a340dfc1184/bozufuvix.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/60863513101.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/zakovukobujomamex.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/kixuwu.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/j89gpt11n0ivvc6841i04ka65o/43100079486.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/a37459fcef273b55ac738be16172d9ab/darofusigabemekewegi.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/73352119967.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/61216458518.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/xasatizikulinimemoli.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/mirajulubumaxogig.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c18a48ab6---37806305906.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE482 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 11340 bytes
SHA-256: 5d5b81924e3ea506f9d607b9b3fe0d56dfac58aeb8806d179845499bbcf0a969
font_02_sfnt_off000116e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E5 16372 bytes
SHA-256: 4fa7b75e803e47627ced18d41157e8f3a8c43c415467b5006c6966e605b089d1

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