Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75ae5f34bd1c4b6…

MALICIOUS

PDF

81.9 KB Created: 2021-09-23 00:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 936f0784d3f3b1afd9da0aee0304bfa4 SHA-1: af6c618e9116da8b7ef0cf5a2a4bb427c66c3200 SHA-256: c75ae5f34bd1c4b6d23aff0179934d31f885eeb43238cad1b430cc6dfa3624b9
166 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a ClickFix social engineering attack. The document likely aims to exploit user interaction by prompting them to execute commands, potentially leading to the download and execution of further malicious payloads from the numerous embedded URLs. No specific family could be confidently identified.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://allcreaturesinc.com/files/files/87809975166.pdf In PDF document text
    • http://fasson.vip/images/editor/files/zafazatumedit.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/6177941004.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/rakupos.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/purozop.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/32357997578.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/47823940267.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/zusuruto.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/50294042888.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/sutigevawabekowisukuse.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/wopoxovoxetajokuwaxud.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/tivipibokamaf.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/zamazebozekazu.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/tusilebibetaziviselewile.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/87306976208.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/48506106854.pdfIn PDF document text
    • http://bdsductri.com/upload/files/66621685829.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/notimo.pdfIn PDF document text
    • http://generaldistco.com/images/file/21200153296.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/72042560149.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/womipanufatili.pdfIn PDF document text
    • http://theflowermaker.com/uploads/File/sobawesupukenegenawolalin.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/41318477506.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=prehacked+games+run+3PDF link annotation
    • 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_off0000dc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 17888 bytes
SHA-256: 7bb9eb77951e57003385e3e7812d83729ca9a32e7e5113b6f33cbe8fdc211961
font_02_sfnt_off00012252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12252 10828 bytes
SHA-256: df9d99fe45997f464d38313fe948d2a5a9fdcbbd7c292d92b343e9955e556379