Malicious PDF — malware analysis report

Static analysis result for SHA-256 baed697a89f39238…

MALICIOUS

PDF

78.2 KB Created: 2021-08-15 21:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 30a672a2335079de91b58583d0d433f3 SHA-1: 13670b5b3526dc2d2d855aba1bfede9ef349e6ca SHA-256: baed697a89f392382291b59b72bccd8ce77ea345ed880a4bc261ff1003b74da7
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm and by an ML classifier as malicious. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection further supports its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pantipplaza.com/userfiles/file/vuxivufixuda.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59f4e5b107---tajenaputabonizunepiregu.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/17914158678.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/tsb49lrhn6bo62q7duf2na5c7c/62230630533.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c7d20290e---vaxopusakadozofanaxiri.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/4ec85a43ca29f0162ef922a2c124d5a7/raxudofes.pdfIn PDF document text
    • http://pasted-radio.de/web/files/fokuzazasugipabaso.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10d64d1840---74283975681.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/0689ec5526d9897f6263720ed7eb2658/11099951302.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dc1330661---vafefegewe.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/zofamofegovexizigutag.pdfIn PDF document text
    • https://kalnapilis.lt/kalnapilis/web/web/ckfinder/userfiles/files/6439154090.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/delibetexawemaporemifod.pdfIn PDF document text
    • http://prograsifkalip.com/files/35075171457.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/widexanemuxitikofivoxo.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f74ac95c880---vexujirupapogudalizu.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/cff0bf86f0f47e7abbebf41ff67a9c7a/lumipigapositerunuzov.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/85347858548.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/zowuvipewipelaponemomoz.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/f36018291bd9525390ddcac02185b16b/sumut.pdfIn PDF document text
    • https://ahha.az/userfiles/file/5318589229.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/89649386683.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=girl+from+ipanema+sheet+music+tenor+saxPDF 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_off0000ce80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE80 10984 bytes
SHA-256: 25d21bf4965c94aa27757d9bd1de630c95669e4e300a2a22455e81e15b07652e
font_01_sfnt_off0000e7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 16536 bytes
SHA-256: 87dc48d9d67402e96f570d3e0b8c0df0927af56cc71457103275c7923e6d1f99

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