Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eefe4ec29309ebe…

MALICIOUS

PDF

97.6 KB Created: 2021-09-10 04:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8fae29d5c645acdc9508ad6bb91a2d43 SHA-1: 25a5f1467dd2f64739c5110dd91f7a57d2c31247 SHA-256: 6eefe4ec29309ebe92e67c5f978653be43f60d2a08f26f956582f4c003e6404c
126 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, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting an attempt to redirect users to malicious sites. The 'wkhtmltopdf' authoring application and the presence of many external links are consistent with a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=samsung+galaxy+s3neo+price+in+pakistan PDF link annotation
    • http://labonscafe.com/userfiles/59069907593.pdfIn PDF document text
    • https://almavilag.hu/files/files/xefiwumejatalej.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/pujolupomagiwarifesaveze.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161387a6438e2c---50872547214.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/mipegaramikusejavagapow.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/sodugebekudujovinabus.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/18895534240.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210901141218_797mnz.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210901115817.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/zotixinevuzadusepusur.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/68736667543.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/20202189722.pdfIn PDF document text
    • https://mayxaydunghoangphuc.com/userfiles/files/wagazemezinizoku.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/waxikakigowemusixekigik.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/68714736965.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/44168852662.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/xefegupofilupe.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/21106102956.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/96414937974.pdfIn PDF document text
    • https://artgreen.vn/attachment/files/gakokazaligefaforisof.pdfIn PDF document text
    • http://marymo.ru/uploads/files/1821913534.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/16614497795.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_off00010b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B54 11372 bytes
SHA-256: 43039dfc6aad37b57c2548ff131260b1c0d0a7f88c09ac1549c8edc934ecfcff
font_01_sfnt_off00012620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12620 22908 bytes
SHA-256: cfcbab6162d6ee888e67bcc891f5662ebdd0605d548992d096d7fc94abd1f383
font_02_sfnt_off000160c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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