Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffdcf694c6ae8acc…

MALICIOUS

PDF

69.3 KB Created: 2021-09-25 03:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e2f566d6b7f6e77a3ab8a43b660b1f56 SHA-1: fc953edf64e23b7af72a38996cbb02563ab01cff SHA-256: ffdcf694c6ae8acc0db17f7fb627e1b1d47097d9668eae8855e85d8f37713ba3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of link farms hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=the+wild+darkness+mod+apk PDF link annotation
    • http://rlmlaw.com/images/edit_images/file/75825006194.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/gijujizur.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/kibevebonesufolinakoraf.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/funebopifutovawinejezan.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/51888355038.pdfIn PDF document text
    • http://houtackers.nl/userfiles/file/lemotuvanelakozuzavovazu.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/wuleri.pdfIn PDF document text
    • https://hoangmailogistics.com/asset/site/files/529670112.pdfIn PDF document text
    • http://instalace-charvat.cz/userfiles/file/jevadazu.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/4hvhdhncbac7femocf3a1rgedj/mesuditixifum.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/25446192212.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/9354697125.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/komigamu.pdfIn PDF document text
    • http://www.tivafa.hu/upload/file/830353838.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/tuvemasesipotusixuv.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a15335773a---19160716561.pdfIn PDF document text
    • http://ortopediaszombathely.hu/editor_up/49155504107.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613de18895621---47427309312.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60749851474.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/58158859362.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b98fa5ede468fd11e4ad67534700cf3b/kogupak.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/gitubososujakofemoneriv.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/5627924268.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/vubijagixewobuzifipivokut.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_off0000af6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6C 15636 bytes
SHA-256: 96eba065e4cae65923eb3eac059facd2448d535d452c515ca65de03e8f8bf352
font_01_sfnt_off0000d76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76C 10700 bytes
SHA-256: aaaa4068659ae6b1a1158f247ff7a31c2ea5599a32f3b34fd439ff59c3ea5791
font_02_sfnt_off0000efca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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