Malicious PDF — malware analysis report

Static analysis result for SHA-256 434fed7dfdb4d433…

MALICIOUS

PDF

113.4 KB Created: 2021-07-27 21:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1215dec55504810e00446a0f274f5efd SHA-1: 6cfefa82d2ac6866f81ba64ab7020cb2bff53c50 SHA-256: 434fed7dfdb4d433eae127ba59e0d78302dfbe1fb91a5591b4efe26ab9a919e3
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The PDF structure and the nature of the URLs suggest an attempt to exploit users through deceptive links, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eb33531ea---limigoxijap.pdf
    • https://planet-pvc.com/upload/files/84886188454.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f1342e1b4---64381044344.pdf
    • https://tiguan-wiki.ru/file/52938806060.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608845b72c25f---gopilekudojevowagovero.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609663383d30c---1788921692.pdf
    • http://chanakyaaerospacedefence.com/userfiles/file/biwavisasegogolutuwadid.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700e1fea7cd---28861990145.pdf
    • https://faktxeber.ru/resimler/files/mamopasimebo.pdf
    • https://aawyx.com/sites/default/imageuser/file/taruduvuvofitepod.pdf
    • https://tortugafilms.ca/adminfiles/file/64476813738.pdf
    • http://arunimaflavours.com/userfiles/file/lufofirekigibafi.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f835c3f4b---78728454070.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b092f7b51a2---86672635653.pdf
    • http://seoulsquare.com/userfiles/file/savanaluwetoxexa.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/893035aa51fd3a1b2e0b8d6a2c9add89/wobuxewaxobudupolifuza.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607419d3b4afd---5380645779.pdf
    • http://tremonttemplemacon.com/clients/862779/File/34966999464.pdf
    • http://linker.tw/files/32674029782.pdf
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/6aff8ec9b0f269051828b32edb9154cc/kupupodepigidufafal.pdf
    • http://langeline.com/ckeditor/upload/files/janararunetotebe.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/eh3vaqoiabpfbnmaggctfj9s9m/20812217643.pdf
    • http://www.cottagegrad.ru/files/file/nonefebejajovetuvirefego.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089dad930a69---moxebofolazixoluwobi.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/10c1190e5782176597245ea0c8ef5b97/kenojobolavekini.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=why+i+am+an+atheist+book+pdf+in+hindi
    • 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_off0001587e.bin
3a332f15c90da3f782f1061e4cadaad112b9a4227883982020bc6d8bddaf8b8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1587E 10956 bytes
font_01_sfnt_off00017190.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17190 16792 bytes
font_02_sfnt_off000189a2.bin
75dd98e5ffcbbff07c0b182d57f91be7a2eb3cfc37becbef38d430510887163c
pdf-font-stream PDF embedded font (sfnt) at offset 0x189A2 17168 bytes