Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf264318719302c…

MALICIOUS

PDF

78.2 KB Created: 2021-09-22 23:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6db75776d0c1c9ea88b76c4253e800e5 SHA-1: 6e5871a7f709018fc6c4196425cadf72a74cc4c3 SHA-256: baf264318719302cd93faffa8f7c451f1236901235a385f3ffe8f436d4a831ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple external URIs are present, pointing to various domains, suggesting an attempt to redirect users to potentially harmful content. The PDF structure and embedded links strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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=play+it+video+player+apk PDF link annotation
    • https://reazfarah.com/ckfinder/userfiles/files/lonizagid.pdfIn PDF document text
    • http://scpt.it/userfiles/files/mitepixumugevogixodowe.pdfIn PDF document text
    • http://zlzljc.com/uploadfile/file///2021090912102067.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/talefif.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/sinegebopowilulevaziti.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/67298457979.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/77828751711.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/tesiwobekebi.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/64232897732.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/lideluxefodasowuniju.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/b11d0qgpkh5l0mjvprdmo64g77/45560992112.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/14117177989.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/9343145266.pdfIn PDF document text
    • https://manenshop.com/upload/files/23966090455.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/32252929999.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136abc9c6e78---bevajuvuvorova.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/xufijanizugutavisujafan.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/92662204743.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/fanusuk.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/mavanajituw.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/zupalejapexopid.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/robumigagadero.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_off0000ce9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9D 17352 bytes
SHA-256: 4d42263a0d38d259eb9fe38d6997bbf63f895895a252ddbda16b092f71415f56
font_01_sfnt_off0000fbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E1 10384 bytes
SHA-256: 56263e6b50a9e2f9b1cfcad320ba4b0c767ed2626e0a1d9db663937ba7c7e67f

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