Malicious PDF — malware analysis report

Static analysis result for SHA-256 68390d0447a39007…

MALICIOUS

PDF

96.2 KB Created: 2021-09-02 06:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c1d9831d093613ab9fbec1e3d0a8a85f SHA-1: ac31aec4e1fa65ab2faf30a5a3ec48a50bdf895f SHA-256: 68390d0447a39007f69e6cb7462761a6d9c058475c179f244e2e8b75e50d87fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of numerous links pointing to potentially compromised websites and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with attempts to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://cosmickino.ru/sadm_files/reradirojotebimavijodug.pdf In PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a37af2927c7---71679091018.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b312750cbb7---70265932448.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/kusubane.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/39731465597.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/59511386342.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/xibenidelupak.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/30074345400.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/31930949591.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bcdb4a850---kiwewoliwonuwu.pdfIn PDF document text
    • http://indecomavo.pl/inc/67648311336.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/nazomapamirurukovafepefo.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/nitikovepinirerabazuli.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ngko4o7pq28fehnla5js7p7ksi/nixunasuwoxugafa.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/b26c0edb06b6abb768fcbf9610b859ec/81509535571.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/37981384405.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/nebarimozewaneje.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/78829021222.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/pusinifetipusobobolozobu.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/suwixapofuvefunuzaze.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/96646255009.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/bb8850ef1c8442438fff554b1e4c45f1/duduzupurepageda.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609233359b806---57408495867.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/xexijejisufokoxiju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+create+interactive+pdf+in+acrobat+proPDF 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_off0001136c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7E 18364 bytes
SHA-256: ea685b63b93a5d1bcbf574edc50a209c952619b50544e5ee54075a1dc242971e
font_02_sfnt_off00015a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A5B 10680 bytes
SHA-256: b81c846b0699278fd1469d12c7978345f45632cbf16266811beafc9bce7afd87

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