Malicious PDF — malware analysis report

Static analysis result for SHA-256 252e6d9c937d14d2…

MALICIOUS

PDF

68.8 KB Created: 2021-09-26 08:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0a41a2e4e6361cdc80c129431ba7e1fe SHA-1: 0aa445b60e9145e69d03ad59f19236b001eb07c5 SHA-256: 252e6d9c937d14d22e2b958c51aec65325c877802dc6a1284253f61dc2bc34d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to various PDF files, with one URL specifically mentioning 'gta 5 online gunrunning download free', suggesting a lure for game downloads. The presence of multiple links on compromised WordPress upload storage and disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://oniceh.ru/uplcv?utm_term=gta+5+online+gunrunning+download+free PDF link annotation
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145e485d2fd4---5438109518.pdfIn PDF document text
    • http://warehousetraining.ie/images/52282116919.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/16222171427.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/39026489785.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/dodumizubomabodopobur.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d117e6e830---72442885006.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/57918061190.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/mamofawutotadato.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/rujexuzomokekagaba.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/3743473557.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/97953820386.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210903000326.pdfIn PDF document text
    • http://hobbes-group.com/upload/files/jadidakapovizoxujox.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/df5bea5b81704f212d1d58f28f26e1bb/12988818753.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/3979907726.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161325542ef9d8---65176581741.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/45478750792.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/xupama.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145268d79f17---tikerog.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/15359439099.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/53876958480.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/3318751487.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/97975064525.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_off0000ae42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC659 10720 bytes
SHA-256: 83918ccef9e89ceaf7532c3c2a2266aa479a206e063328c7fa3fe055515723cc
font_02_sfnt_off0000df00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF00 15248 bytes
SHA-256: fe2f8d60623bcce12c1d8384f17d9770411e7ce292a4d4d1b9145c66a2861757

Open this report in the interactive analyzer, or submit your own file for analysis.