Malicious PDF — malware analysis report

Static analysis result for SHA-256 249c3d29f03e7912…

MALICIOUS

PDF

83.6 KB Created: 2021-09-18 12:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b1404952a34208c35751363fa9cbda89 SHA-1: 3f67247cf7181a5da39cc7088c479218e882f1a8 SHA-256: 249c3d29f03e79126397fc449ba1988f05bb3264c493c887c597973d163a7f07
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains, suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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.
  • 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://wastran.ru/uplcv?utm_term=zombie+forest+hd+hack+apk PDF link annotation
    • https://ibrahimkoc.com/images/Media/files/89053291400.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/29590544728.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/30162591279.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/xuxadetitadabop.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/kawagogokeropinodib.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/kusuba.pdfIn PDF document text
    • https://malmospelmanslag.se/userfiles/file/gimisi.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/12371166807.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/23065411043.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-3/20210903161727289819.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614324e03aebf---pefonubeseg.pdfIn PDF document text
    • http://ctm.it/userfiles/file/ropan.pdfIn PDF document text
    • https://breedlife.com/upload/files/nurovidufi.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/h8go5kc6o2l4qav7pd6gck79m4/zovosorowa.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/nebeluvukumaxopunuso.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/lozovubobuxosowu.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/98458002281.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/82132914458.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/zisikubirewin.pdfIn PDF document text
    • http://edituj.cz/res/file/ditegoditubizax.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/56048724532.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/tijibilemewomowanup.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/75739842738.pdfIn PDF document text
    • http://www.lbtfilm.com/uploads/files/xozuxuf.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/favekuwamulir.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_off0000df7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7C 10932 bytes
SHA-256: 6af4691103b2d963a8c06fa73942f0e6e6eebe23d5b95b99d66ca1a4b3b284f2
font_01_sfnt_off0000f8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A2 18036 bytes
SHA-256: ff6739a10df68cbcb223345c51fa90540f31b66061b5055d4451aa2b1add62bb
font_02_sfnt_off0001282d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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