Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e08a9414a9e9ec8…

MALICIOUS

PDF

69.9 KB Created: 2021-09-08 23:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 806753d79477151a3afb1897b0d6708d SHA-1: da6f5250bb58135a05a10dd58bb351933590e6c8 SHA-256: 5e08a9414a9e9ec80f621f57fba004a51c0a93fbda80a2bdeab8f0599240a4c5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://huntic.ru/uplcv?utm_term=pokemon+mega+platinum+gba PDF link annotation
    • https://exam10.menapoint.com/app/webroot/upload/files/38686550669.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/telovevozawuzogimo.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/xituzizapunudive.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/dodofudixivanotelawim.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe3c10ab56---pakofopomimi.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/wulapinonokegizaliwemunid.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff8ab7f30c---bexopogobijamedofusa.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/jagatibipixuwidoni.pdfIn PDF document text
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/21365223776.pdfIn PDF document text
    • http://miass.realxenon.ru/uploads/files/bobozidibonologe.pdfIn PDF document text
    • http://unitez.net/images/newtech/files/2192767750.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1630648016.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/zoziramuxalowebejovedov.pdfIn PDF document text
    • http://ljsmelt.com/upload/files/54572235673.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/61488655604.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/sizemagazolenumakarutulu.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/88909825454.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109031021533554.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/29917130810.pdfIn PDF document text
    • https://endobible.com/userfiles/file/tokigesovonelenitad.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/71f6c12d5afbcfc18e7b34d2c1049c79/31246540741.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/78208316845.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/56751381711.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_off0000af83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF83 10660 bytes
SHA-256: 176ef71b46c32bde7a33ee413a2fa4a593b223c42da682acdca709c60b17527c
font_01_sfnt_off0000c7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AE 16328 bytes
SHA-256: b652997b2dfbb322484e4c08bf62f174bdd64fa7598a236c47510c2ff2d61dd9
font_02_sfnt_off0000f1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1