Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62bf542893475b3…

MALICIOUS

PDF

85.5 KB Created: 2021-09-15 07:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 07e293f49e5459d6f4b6300b4ea58fc7 SHA-1: 6b30e3c471ea7e5912a135beb8325591ebcd095e SHA-256: b62bf542893475b3b49c2fc3f57ab6646210ea861eb86c01f0d4d7776e43a106
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to disposable hosting and compromised CMS uploads, suggesting an attempt to obscure the ultimate destination and evade detection. The presence of a 'sports live tv apk download' UTM parameter in one URL hints at a lure for potentially unwanted software or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://holland-ex.com/images/blog/file/vuvowuzufudu.pdf In PDF document text
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/10734580611.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/91625439464.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/718ee123b72e482a1e0f762a130f747d/9092213286.pdfIn PDF document text
    • http://www.centralperdana.com/file/30859818237.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161417200f180b---zojanojuzinexu.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/20415540473.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/63963087399.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/tamaxu.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/fusuwigiwofutativinexawoz.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/xubagakogasutowabojet.pdfIn PDF document text
    • https://isigakizima.net/img/tmp/file/31318707078.pdfIn PDF document text
    • http://letsfinal.com/userfiles/file/rikazulewatunokek.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/13322983482.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/40990246269.pdfIn PDF document text
    • http://nprofit.hk/userfiles/porumovovowozubapimuja.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/90527005237.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/87046391806.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/19202147798.pdfIn PDF document text
    • https://designclarf.it/file/duduteme.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/80058332945.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410f783cdad---fepunikaxerufedevuwog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=sports+live+tv+apk+downloadPDF link annotation
    • 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_off0000e8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A2 18280 bytes
SHA-256: a917374ae97c62a73444c74cf079443ad8c94113d94ecec6acb9db0c79892d91
font_01_sfnt_off000117a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC0 10704 bytes
SHA-256: bb9935ec4373e358abf6fe4384c3505f7abc1bb0c3645162331133b2628f3671