Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2df1d2fe19b974e…

MALICIOUS

PDF

83.8 KB Created: 2021-09-23 16:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 442e574dfaca6457aae55086b022837e SHA-1: b045b180452c788d4ae16186121f0f87439d6e98 SHA-256: d2df1d2fe19b974e0825d6f0ac519dc7d511f3eef19e928f1bee921e33a1ae1a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading further malicious content. No scripts were extracted, but the overall structure and URL patterns point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=rabb+da+radio+full+movie+download PDF link annotation
    • http://dieta-plus.pl/userfiles/file/80231803146.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/tinopepigujobozofep.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/bugozetaxezumobabemoxi.pdfIn PDF document text
    • http://geose.ru/userfiles/file/visewudepesisepodinakufo.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/medazulaweje.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/1153299662613f4d5168bf4.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/98285955965.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614bdee648b00---55009378639.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/24209162878.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/bawawojiwegulutemi.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/acc5ffa98c25437edc55962b488e454b/sopatuvolo.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/gelesitag.pdfIn PDF document text
    • https://partetesal.ir/data/file/menev.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/88377151954.pdfIn PDF document text
    • http://napiarsaigh.com/images/17439314512.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95599393356.pdfIn PDF document text
    • https://everestart.com/images/stories/file/7017119430.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/7479146703.pdfIn PDF document text
    • http://fundacjahfg.pl/upload/file/89275192029.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/lifiradaveteposuzez.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/16649949006.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/zujinirukut.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/91208369300.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/jixogonib.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/48448330381.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/vojeme.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_off0000e39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 17692 bytes
SHA-256: b91f3431e667fa62ebbf741a7c56b6891ae49554d5275d4d93663bc28d5de4dc
font_02_sfnt_off000128f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F2 10684 bytes
SHA-256: 8a9dbd34ee2ecc36c849f8867fb8f3d93edccf49ad4c193705181c0bc7c7e25c