Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0861b6a83d962f…

MALICIOUS

PDF

82.1 KB Created: 2021-09-19 06:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2d21bc215146dacbc968177ba6c5546 SHA-1: 6ee551583017593e1301f6bde8d31ba59a881e9d SHA-256: 7e0861b6a83d962f6b57572a3c603cafe55a8e0b46cb0d269d8e894b83c58897
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to obscure the ultimate destination. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The embedded URLs likely lead to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://chcial.ru/uplcv?utm_term=game+idle+android
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/f451166a7c00ce4befc4eea9b8555943/tidufagavagewilawaso.pdf
    • https://keralahappyjourney.com/ckfinder/userfiles/files/javinilakev.pdf
    • http://trevorhannant.com/18192255686.pdf
    • https://pikhospital.com/ck_uploads/uploads/files/4135090708.pdf
    • http://artwatch.ru/userfiles/file/mapedipovabimimezuxapeba.pdf
    • http://sportingfoundation.com/uploads/file/62552618846.pdf
    • https://celebicatering.com/upload/ckfinder/files/jobujar.pdf
    • http://wsm.hk/images/files/xizugev.pdf
    • http://dochoiotovn.com/uploads/userfiles/file/xidezegegomozigexonu.pdf
    • http://sunriverps.com/data/editor/file/zilajupafadalogimese.pdf
    • http://henca.com/files/details/file/42018740614.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ded5d0eeb1---87305894862.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/b4ea4e2472c22f311372040377deafb3/riputikivipodesuxemewugo.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/54ee7f9b65c1bc2a5aa0f27a82372746/gotufig.pdf
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/gijilebanimulebifabelelaw.pdf
    • https://mantyobras.com/userfiles/file/kejiwamariralixodamawuba.pdf
    • https://imaggu.com/ci/userfiles/files/8557348333.pdf
    • http://nikolabartakova.cz/files/file/57585766454.pdf
    • http://xinchenfast.com/upload/file/17204038849.pdf
    • http://villacappuccina.com/userfiles/files/bugofomamegemuzu.pdf
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dadutagelaxelizewesoz.pdf
    • http://splogservice.ru/content/files/51087119723.pdf
    • http://deleeuwputten.nl/site/data/ws/files/56480240104.pdf
    • http://tdbakademi.org/userfiles/files/pawodakonevun.pdf
    • http://eichler-kammerer.de/doweweg.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161403807d111b---24113179760.pdf
    • 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_off0000de96.bin
9967096fcdb16696204d84a1f7b9c4a679a9f39409a088239d497dc5d7fd079f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 10184 bytes
font_01_sfnt_off0000f542.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF542 16792 bytes
font_02_sfnt_off00010d54.bin
f7a7182b64d70577b00b05e97418fa1be95110d5fd85367cd06973699ebb13dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D54 17360 bytes