Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7061f7bcfce96c…

MALICIOUS

PDF

77.7 KB Created: 2021-09-12 01:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 13f17046d6f68727445447c153fc6173 SHA-1: 2311f0bbc4fbbc3d30571e0271100fdd0decbbc4 SHA-256: 7c7061f7bcfce96cc3238a3c32a320b4646f91f6ca212a9615ca2bd298c26da3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The file contains numerous links to compromised websites, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/uplcv?utm_term=bollywood+movies+watch+online+site+free PDF link annotation
    • http://lamekatus.ee/uploads/ckeditor/files/64825314223.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210904095131.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/zezisulobog.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/4952994895.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/kabojokolo.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/22920865331.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/61224871101.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/20abd49b439b97c8cf969c5ea4fc2184/19944503202.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/58895678666.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/ladulatetudonanamerukede.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/513456650203aa6aed972ea9997c7af0/gaxalot.pdfIn PDF document text
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/norunetu.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/rejowunil.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/xurigemizewu.pdfIn PDF document text
    • http://c-six.it/userfiles/files/mepojekejiwifo.pdfIn PDF document text
    • https://retta-bg.com/userfiles/75151981014.pdfIn PDF document text
    • http://asid.rw/userfiles/file/girisawiliwaroma.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16130458a77e28---36436768611.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/gexenareja.pdfIn PDF document text
    • http://hmsendo.pl/uploads/editor/file/wugawotatokikutebafaza.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/xokuvo.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/31764579316.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/21410832477.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_off0000c982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC982 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 11060 bytes
SHA-256: e661b2bf26603061b295f5466a041651988efadcc09d5e8cba90037e4cb7f5a3
font_02_sfnt_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 17692 bytes
SHA-256: e441e95c6b13bd3610a71e14530011f2a5ff06812499b60c77aa86bb67f549df

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