Malicious PDF — malware analysis report

Static analysis result for SHA-256 467c83259a2f12b7…

MALICIOUS

PDF

82.5 KB Created: 2021-09-05 23:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 089d47ad535f221e0666a8d5b298bfb8 SHA-1: acc788808414317aab3d6403605c3477570a2e3f SHA-256: 467c83259a2f12b7d7842dbaa236260b7f03b38726e5513abe4bc697b5d87534
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains numerous embedded URLs, many of which point to potentially compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://termocity.by/pics/files/94277825658.pdf In PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210627_51E157C395DB39A7.pdfIn PDF document text
    • http://banning64reunion.com/clients/a/a7/a71e9339640f4be667ed55590a288245/File/40264411085.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a786d67842---lurafiwanumiroxujodiged.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/suxipozademasu.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/25829817578.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/ripolewujetijuzegajiba.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/96309602308.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/tumegizotigun.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5dioc98b609lijb78sejkrgnnr/ritudibad.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098614bc011b---zizudagekibunekexasovuve.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/21411647375.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608292de5d390---zijasalonuwuxeleludad.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210812105153_288254695.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/nabibajuvunafufotijel.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/62ecdd09d85a5c55a2d060256ddf662c/96957181861.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fc6d597da81---kifubidokuw.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4db8f77d7c---59240780696.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/71225052362.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/luwiba.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/wodidodofibufigejurilos.pdfIn PDF document text
    • https://puppometalli.eu/file/26210225118.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/46430506672.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=introduction+to+elementary+particles+griffiths+solutions+pdfPDF 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_off0000d98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A6 11232 bytes
SHA-256: 30aa3eb13cc76653ddd3d074f1e670b86ad564f70dc77b6b6a53618c3d6040c7
font_02_sfnt_off00010b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B98 19032 bytes
SHA-256: 9fff9df11d00724d10268402f4dfdc4eed8bef8d2414a863ecaa9036c7467b0e

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