Malicious PDF — malware analysis report

Static analysis result for SHA-256 2970beaca80e73ae…

MALICIOUS

PDF

77.7 KB Created: 2021-09-02 19:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e69b126e1b62a1fb42d7478271ec3112 SHA-1: 58a21a8aceca7e177f7ca213ee0ebbce6eb33211 SHA-256: 2970beaca80e73ae9c1e646f43a39c40a99f408ceeb1e49ab70aa4d0a37e25a3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=manual+heavy+silk+bandage+vanilla PDF link annotation
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607498fee24d7---14335175109.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/tezaletaxesox.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125d53690ace---pabax.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/renalefaludafafin.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/82902970399.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210902142230.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/31843437820.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609119fb7a94a---jukawuwitudoxalefudo.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/3f7a9bd11f3c88e771956e5b978bc335/mixajixajibiraguv.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/todixidulunanutumoxateto.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/15491647254.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/24eb487b031b4850404449d60f3cf794/jikevumapap.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bedcdc7b59e---92842634154.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/momalixazofomojoromafa.pdfIn PDF document text
    • https://micsys.in/userfiles/file/fudexiw.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/bixusodimalafovupivu.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/21220308726.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161141d3017882---kifigogagonomavuka.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9eb67c18a---79018021387.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/zovatuxa.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/97603561576.pdfIn PDF document text
    • https://ntc-container.com/upload/files/mosonex.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/matufatifasixoloxig.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://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_off0000d120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD120 10712 bytes
SHA-256: 1f294aa4e9cbf061dae363aff25208563171bf2548ca13df7d5bfea9d872b614
font_01_sfnt_off0000e966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE966 16992 bytes
SHA-256: 22ea116105c1bd7344d0244aa33ca24f4b5eaa9043ae75ec32670e47ff5761c2
font_02_sfnt_off00011596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11596 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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