Malicious PDF — malware analysis report

Static analysis result for SHA-256 260ab29257352737…

MALICIOUS

PDF

75.8 KB Created: 2021-09-07 03:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 45e0683e77e984eaf651e8cd5ff20b3c SHA-1: adf88ecbd5f5f58b12483a6b30afed3345d9338f SHA-256: 260ab29257352737f27fee989ee49921cde4ad3d2153191db7e8ee29afe3c74e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute malicious content or phish for information. No scripts were extracted, but the presence of numerous external URIs indicates a strong likelihood of redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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 http://asiadomainstore.com/userfiles/file/rorikimokum.pdf In PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/jabegofukeja.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/dovujibasavemoluparereku.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/davidumatikoxajogelinafo.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ad39bfcd7---49553958029.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d1abaccb79---negavopojanumagop.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/c244226ddf5fb3acd3e4fbb9fecf4a19/nevuminegalozawirelirera.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/8d0eece7a61eb10917537577e56ad636/zaduxoxorurojumen.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102c67b32d68---63383617470.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/467ac7b0032a78c690f82e96abe6a9ec/7566120140.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/07334ca8a2c138e2d30d72c4ab333fdb/wezobopamijijop.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/wotogitorimitomarax.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/43444220596.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/338227e8332109223895746e92bccc60/rosikulujagiwaku.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/2jluh0t5rdk961g1vpnjp1d4uc/86554394451.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/14758244794.pdfIn PDF document text
    • http://benetalent.com/upload/files/95425529396.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcc483ba62---kidexajiga.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/3064588785.pdfIn PDF document text
    • http://dentistturkey.com/image/files/duwejokufagavixezefubugi.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/54562533067.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fa0cc1358---42673517503.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=launch+creader+crp123+manualPDF link annotation
    • 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_off0000c509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC509 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD20 10700 bytes
SHA-256: f1165bb0f80224a2955a0eebffc7449a5fbb5d23d37572b025da625fd17f0125
font_02_sfnt_off0000f584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF584 16784 bytes
SHA-256: 7fdab5114aacca4872797557dd684993b0193daa5d0c9bafbd8844545db700b5

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