Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d746d6f5d345c8…

MALICIOUS

PDF

87.3 KB Created: 2021-06-30 23:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 265646b80002a0596ea3ec4190fe1484 SHA-1: 752f654d8cd6da46c64deb127ef26154a646e0cb SHA-256: c5d746d6f5d345c809b6f06aa48be95279b47ed0751671333d091441600c2513
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/torovelixowotodigoj.pdf
    • http://habitat3.eu/userfiles/files/23864459373.pdf
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/xibadirevugokek.pdf
    • https://noddy.nu/images/file/dabunoj.pdf
    • http://webinaris.biz/ckfinder/userfiles/publics/files/vizaj.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaf2a4aea3---1931336669.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f49ba1d71a---nutakodifa.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b72f8c8394c---nezufu.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/23b9fd3cd0580da8a651de55978f6117/58343952417.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/f6380101bafc5510931060e6e8440062/59391853664.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/c544dfa41f955ff3ca4264613b637b92/82803384060.pdf
    • http://aylincinarli.com/fckfiles/file/jodevixojegok.pdf
    • https://agatanorek.com/files/file/75923545933.pdf
    • http://aostavet.it/userfiles/files/dugujexezeselapikorisin.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/fc64c3c934339428f3d24503a541ff89/89057010399.pdf
    • http://pattonbrayboy.com/clients/8/84/8444fd18e659e4cf0f5d78ff5dcadce3/File/lisikitexu.pdf
    • http://kcobafl.org/ckfinder/userfiles/files/xapivuwogefijojodaxureviv.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a0abb01cf---21269304480.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/7368da6ed3bc97c9d62b969d012dcddc/nivawoxebazuvupufimami.pdf
    • http://airsoft1.ro/files/file/zofizelajipejipogaviluxo.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/3f71bc1cedfe628516ed67d9a5ac3ea0/wetetepubejezamoxu.pdf
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/fsqb6eglnvn8jtscqkerplodh2/kofagow.pdf
    • https://daaeportrett.no/upload/file/51638142168.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072da7f869e5---74120541347.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=in+your+atmosphere+tab
    • 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_off0000eebd.bin
1ab6cd9df16607d3271f74740d09e26b67e51b3834926635d725018631a19bc4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBD 18600 bytes
font_01_sfnt_off00011fdf.bin
ff55dae7d6507412c6dfd4e19efdca76c031ef357e05a77e04ab973ea21e1a9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDF 10684 bytes
font_02_sfnt_off00013808.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13808 16792 bytes