Malicious PDF — malware analysis report

Static analysis result for SHA-256 12db2b65638fd86c…

MALICIOUS

PDF

75.7 KB Created: 2021-10-03 05:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5ca9b900baf932e991146e4c7888c88b SHA-1: 774aa7acd71ff732020beee4dcac41b0c78ce9f2 SHA-256: 12db2b65638fd86cd29be7366dfe1a1a71138d709d6baae85072ec23a0788bd8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The PDF structure and embedded content suggest it's designed to redirect users to these external sites, likely as part of a broader phishing campaign or to serve as a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://irlanc.ru/uplcv?utm_term=free+fire+unlimited PDF link annotation
    • http://ctnphrae.com/ckfinder/userfiles/files/turemisesorifanamekanana.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-10-3/20211003025808619742.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/63502280844.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/nulufujovifuterasunu.pdfIn PDF document text
    • http://ymmicro.com/files/files/55952480953.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210917150843.pdfIn PDF document text
    • http://bilcafe.it/userfiles/file/joguwawodakofos.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210917_37C0836FC15D5F4D.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ca1125b7f9972226b8e6beca87d0dcd4/takevajar.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/vosovafujekapoke.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/mabigokugo.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/27647521697.pdfIn PDF document text
    • https://granitnet.hu/editor_up/14185056915.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/vasufapakuzopowatedoneten.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/56860178837.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/fowifusinadurabegamu.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c00a15c7b1---78153851194.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/42613063314.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/xekimavovar.pdfIn PDF document text
    • http://decorstore.eu/upload/file/59207181658.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/tanoz.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/mapazezadipelote.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210915_220802.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_off0000bfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD2 19356 bytes
SHA-256: 0fb1dd75862ae8fa4a5c96fe71ddc565bbd15b4a4861cfaae8d5f931970d129a
font_01_sfnt_off0000f2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE0 10140 bytes
SHA-256: 477fe7e991c85bdfa57f4f780faba37ac8d73344a1dc0dfc3490c2f28f14a0d5

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