Malicious PDF — malware analysis report

Static analysis result for SHA-256 950a1afcfea1ba4e…

MALICIOUS

PDF

67.6 KB Created: 2021-09-26 16:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5bcc406d420bd64e04c62dde10bac239 SHA-1: 8bcf3d42be9c574c37d5d98d5ee36d1768cbe750 SHA-256: 950a1afcfea1ba4eb3b0bc3bcd2d1abea48b9e1b255a9b71bc020e3f3a375cd2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-based design with a clickable action, directing users to external URLs. The presence of numerous links on disposable hosting suggests a link farm used for distributing malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://crysiq.ru/uplcv?utm_term=list+of+all+mythological+gods PDF link annotation
    • https://girisimhaber.com/uploads/file/11657339374.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/89712649000.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/nemuxededated.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/84759720152.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/58629686490.pdfIn PDF document text
    • http://sanjarbek.uz/userfiles/file/8657823500.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/42805007252.pdfIn PDF document text
    • http://volker-issmer.de/userfiles/file/daguse.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/38678127154.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/92136052554.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/nelisopapumixebo.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/74868619959.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/92591804882.pdfIn PDF document text
    • http://mestan.by/images/file/54099498657.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/98350007219.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/jujofizivenabiwisot.pdfIn PDF document text
    • http://peak-experience-japan.fr/images/blog/file/6205414213.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/42956420516.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393d0d283b6---getenekukedugaso.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/34718549158.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/zoravezokabikufirev.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/17676016526.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/91593531489.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_off0000ad89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD89 14120 bytes
SHA-256: 46d655f3ac4a27b6d382577555c84cfb75d892c0919bf8789e1c5e5bc2116c76
font_01_sfnt_off0000d0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F6 10660 bytes
SHA-256: 7b9f4780de11f82de3500815e036fe2334cbe9408c5f2a54eca7d0810f2863c3

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