Malicious PDF — malware analysis report

Static analysis result for SHA-256 07160bb2eefb4446…

MALICIOUS

PDF

83.9 KB Created: 2021-09-20 04:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 834fe6d5bf95ac43c7359dd02fc6e3d6 SHA-1: 10d4c00bf2f1230426e64c5337c1f119efff090e SHA-256: 07160bb2eefb44467da92b7967ea4fc3c82275f11d6c856e4b6377e6c030fa1e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many of which point to disposable hosting and appear to be part of a link farm designed to obscure the true destination. One prominent URL, 'https://garglob.ru/uplcv?utm_term=kabir+singh+full+movie+online+watch', suggests a lure related to popular content to entice users. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=kabir+singh+full+movie+online+watch PDF link annotation
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e685c02f6---84773260128.pdfIn PDF document text
    • http://quetthe.com/upload/files/47689657497.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/noxukakomat.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/5730390095.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/nibudijusuzu.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/wuwikovenax.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/8909361592.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/xiwaro.pdfIn PDF document text
    • http://apismorava.eu/docs/legabuxadad.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1f7f13071---wugadimup.pdfIn PDF document text
    • http://parateam.cz/file/ronanagopafigazubi.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/31242984725.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/1125835147.pdfIn PDF document text
    • https://trisyscom.com/userfiles/file/89046877673.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/23680291522.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/zuvibodatavuloz.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/rakojoxekali.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/kunolanibupisuravevufono.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/lutug.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/3492866738.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/21810190275.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///luxulibosunuwugenalokuxo.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/89020173969.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/lukabemoxuzeli.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202199_18359_605.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_off0000e158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE158 11164 bytes
SHA-256: b4e73cfb08e10855c598ce38a70893e65746a87ac79429feb23d5c7811ae423b
font_01_sfnt_off0000fb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB56 18016 bytes
SHA-256: 3dbc488eae8b948bccdae96b880bb3c7c3820f1f5703ffbc64b6e042fe481dec
font_02_sfnt_off000129fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1