Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8abe75410b15eae…

MALICIOUS

PDF

67.9 KB Created: 2021-09-22 20:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d24df220e7397f4d60f0b48c8afed3fe SHA-1: a69459c3dabde9ccfdb1b662e5e18e75b3daf058 SHA-256: a8abe75410b15eaea36961eacf9049ef11132d3e89d6e22d5988d71688c3a1a3
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised websites and IP addresses. These links likely serve to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6930

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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=nonton+film+tokyo+revengers+live+action+full+movie PDF link annotation
    • http://studiozammuner.eu/userfiles/files/19304199035.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/dekalukexefamabibokega.pdfIn PDF document text
    • http://xn--lv0az70cxar.tw/uploads/files/202109131813287304.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f309e9f7bc---sekalazagu.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161374cb16515b---muxovogo.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/sazasopabilaronozebumuz.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/ketotixik.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/runazekimutibiteja.pdfIn PDF document text
    • http://domosplast.hu/files/file/19687611730.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c302ec768c---9755780468.pdfIn PDF document text
    • http://szm.hu/userfiles/file/4741952581.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/24752748328.pdfIn PDF document text
    • https://tedesco.pl/userfiles/file/87339068100.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377832c8145---rubevalovotawililopix.pdfPDF link annotation
    • https://detmers-kontejner.hr/files/burebupetuber.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/80764131468.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/7631906186.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/60899753879.pdfIn PDF document text
    • http://tythb.com/uploadfile/files/99356499539.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/62013883756.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/kivexuxixuvite.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/misane.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/745937af9792f8485022e899ed424d11/31936261782.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D3 11028 bytes
SHA-256: 03284adc94a8e9548fe71c56eec74fe061a714615a4d2137e491f064333eeaa1
font_01_sfnt_off0000e390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE390 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1