Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0e59ff46562ad9…

MALICIOUS

PDF

81.9 KB Created: 2021-06-29 00:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3cfe6b63091e7e13970c515aab25e0e SHA-1: 8a1fece4cf5a68340ad73b222e73dfac098f3c8a SHA-256: fa0e59ff46562ad9e3174843f557e08716503cb7c0651cc922b95ae6c45f8bce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

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://drafthe.ru/uplcv?utm_term=word+to+pdf+converter+free+download+filehippo
    • http://schokobrunnen.com/idata/13011570870.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/e8023c117e748e971a6d7778ac03fd03/10515627502.pdf
    • http://fkhd.cz/data/img/figobojuviw.pdf
    • http://www.masozilina.sk/ckfinder/userfiles/files/12227637678.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2d9a251c9---bapukidewi.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d8f0ebc7a---gemulosibufonuz.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/25874404855.pdf
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/k1tnnjqq0482isg47341gkjo0i/gipujufug.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/6e0a50be9c2c1bcb6ff98a70851c34d5/22977345504.pdf
    • http://airholic.com/UpFiles/WebEditorFiles/file/jikuvag.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/woworadefumefojamijolofiz.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/38441295196.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf8eb545e---61742420917.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e62c875e8d---ramekutogafovad.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/53915934971acc230f6385f84691a7b7/71707188578.pdf
    • http://www.tokyomagic.jp/images/library/File/14817420996.pdf
    • http://fanti-fitness.pl/uploads/assets/file/33466033543.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/0dt45qa746db8a5ivsu2qtibmi/50933017665.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5add8f3ff---kapudexowujezi.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91df10988---6056827107.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/r4og5n4jfjcbop6ivilo5i83bv/2316009203.pdf
    • http://instant-image.net/UserFiles/Site/File/68883003720.pdf
    • http://mariopresto.pl/userfiles/file/zilaximo.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e28e98ec3---1828901507.pdf
    • http://veterinariogiardinelli.it/userfiles/files/92144138972.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4B 16792 bytes
font_01_sfnt_off0000f55d.bin
73e06e78abda3db4aedf9a43549becb646e6de82e607cd8c1bf5783e3ac9d779
pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 16928 bytes
font_02_sfnt_off00012171.bin
ae0b17efc8fd9d263a19806c5dd4e274ec1a085e8f60e583d711d9f7ff444574
pdf-font-stream PDF embedded font (sfnt) at offset 0x12171 10696 bytes