Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd0bf7a35e38d6c…

MALICIOUS

PDF

98.0 KB Created: 2021-09-11 14:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 59ba747eba0b0fe0b28377919df02d2e SHA-1: 81efda20c9d92623f6bd1128c525df66fcc86d39 SHA-256: 2dd0bf7a35e38d6c42f9efab663d1bdc675ae61b96e713322c1b661951e97bd5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable domains or link farms, indicating a likely phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=krillin+x+android PDF link annotation
    • https://chulintemple.house-well.com/CKEdit/upload/files/32921966208.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/70200588003.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/zurud.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/jaduputasebopivox.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138ab7d32b33---21449027578.pdfIn PDF document text
    • https://dalba.net/other_files/File/tivukixipujujanobateso.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/39050464247.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/dugotigatopudabarunodow.pdfIn PDF document text
    • http://ytdrive.com/CKEdit/upload/files/31010659730.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/duvuranuded.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109080533078986.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/99808832119.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613904cf7a221---sosabejajubebixila.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/zijemorisedixinimisu.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/17167858327.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/39877742041.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/fexifakurakoza.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/80339487582.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/mirowe.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/30637628434.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/tisenekexino.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210901111051.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_off000118c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000130d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D8 9936 bytes
SHA-256: f5c7d749d79af26b712e58bcc6c67b7368958cdedb068a35588f94358505720f
font_02_sfnt_off000146c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C2 19400 bytes
SHA-256: 1aabc657dec2fbfca5427fefb2d052c7d2e998cdb36fef7987538f879b95daf9

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