Malicious PDF — malware analysis report

Static analysis result for SHA-256 863f60abc0c85c4d…

MALICIOUS

PDF

84.6 KB Created: 2021-09-08 11:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 681f5bb2f93bfb2ed1eb257ea79957f8 SHA-1: f523383e1f6ddacf401b86ad4a6d0b5fe1f3bee3 SHA-256: 863f60abc0c85c4d18f45e0a1d48d5de0a865b49249907aed22558e5248f2706
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://infrive.ru/uplcv?utm_term=fundamental+skills+of+football+game+pdf PDF link annotation
    • https://nhadatonline24h.com/Images_upload/files/57242619675.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/77549937275.pdfIn PDF document text
    • http://asvpp.fr/pdf/76051222979.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/ca093f19790ca344d6a4093cdaa10c75/vemigukonevin.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/juxinotusuwigi.pdfIn PDF document text
    • https://xn--faade-zra.ch/ckfinder/userfiles/files/13914520344.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/pozufuruxada.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/1617889251.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/feb73a186433463990c6d412a176cc52/66363099789.pdfIn PDF document text
    • http://isleford.com/filespath/files/20210820184406.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/tagalezufosev.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/zizekuw.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/d0b5199202f3fa0bd49d82e449c62ed2/98000570752.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/nokebow.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cc64f4c79ec245cf8780df4efc5b302a/99023964041.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/bfe4b5c258f7a053ab6fb43da5e4935a/reledinuvinakixik.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/214837bb126f9dffa22ccaf0184f4844/kazegiwuvokisona.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/21311e961bb8fea375feedeb4890f26b/47091281930.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/81317041280.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/19011110476.pdfIn PDF document text
    • http://clingac.com/d/files/59002242493.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071719391c5a---21915159789.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/82b8e0hoojol0njufpnolb4h35/29368669490.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210713_153212.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64D 11048 bytes
SHA-256: ef060c0b3c73c83afcf203f994fa7513215b4f3b609260b4bf1c2584645abc44
font_01_sfnt_off0000ff97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A9 17276 bytes
SHA-256: 2610d6db8f2a8cd9bc154b24b25fbbaf3e99c8ff07c42dc0f4aa0e3be653ae44

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