Malicious PDF — malware analysis report

Static analysis result for SHA-256 479fcf5c0bca6b43…

MALICIOUS

PDF

86.4 KB Created: 2021-08-18 03:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 25fafa2e32e5fe42b26d4f29987fb964 SHA-1: 26ae3a789bc6cca0d23b09040d17d8c60ebf247a SHA-256: 479fcf5c0bca6b43f31f82a4d5600eb21746b2caac65b5c251a6fc6c5c38d177
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent. The primary goal appears to be directing users to download potentially harmful files disguised as legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://allytemp.ru/uplcv?utm_term=call+of+duty+warzone+apk+obb+download+for+android PDF link annotation
    • https://anctools.com/ckfinder/userfiles/files/80258551170.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/vce4q6u73pv9let1lsputaah9s/duvakonudigetufuludeziv.pdfIn PDF document text
    • https://bepcongnghiepphuchung.vn/userfiles/file/kitajesapu.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/35af6488f2f62ba9949b1927bfe6035e/83444954152.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/fukimorabafabavalepazej.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/c89iut13ifgmreq5ohvj7ir1nh/nuxanar.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/52245636372.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/72da014201b7433aca66c0b58a74f9fe/58653126026.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/2u45i0qdat43vkkf0daihb4rub/35119471269.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/wuwowupofuno.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/koxoxipekijidim.pdfIn PDF document text
    • http://concurs-euclid.ro/upload/fck/jelujimerusedaxode.pdfIn PDF document text
    • http://dalaichau.com/files/bomojo.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088671f6b06b---56912719605.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c31bb2c9e24---xasofaxuxidovaberoz.pdfIn PDF document text
    • https://baptistfriends.org/media/renufiligudenutu.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/vutalex.pdfIn PDF document text
    • http://kodemari.info/data/files/wopovijetaduporikixemuj.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce52c3dd81c---52194948860.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/69670710976.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/febiwelekeg.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/68019741780.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_off0000ebfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10412 10948 bytes
SHA-256: cf3262261431dec103ec270516fae4c6bc5f4910f96172c9a4d8d89c635c6c06
font_02_sfnt_off00011d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D70 16824 bytes
SHA-256: f42d645ebf5a763aed0372348dab5fe3ee83a269a4b02b52aed3733cf348fa7b

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