Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69d60ba501aa6b0…

MALICIOUS

PDF

95.6 KB Created: 2021-08-21 14:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 521ab48073f1edb2a10e4fd44d497326 SHA-1: f209ac1de023891e4e6266a4883221439636ecc9 SHA-256: f69d60ba501aa6b034a01c04426d7c09839f5db019540bbc853732801df38edd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of external URIs and link farms suggests an attempt to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7775f25c02---19873795133.pdf
    • http://abimobiliare.pl/pliki/File/minotizejodigezosijedof.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/3165f407b169de51a96aee8d82b45db1/xumedeb.pdf
    • http://tovicetour.com/FileData/ckfinder/files/20210712_EF2FC49D39075BF8.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e8a15b984---29805873754.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160e13d556f7b7---76203343515.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/e000b3f6d102278ed2c967b1d11a79f5/44807529340.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080226dad1d6---58274050246.pdf
    • http://acpiindia.com/userfiles/file/18358140790.pdf
    • https://vannordenvastgoed.nl/userfiles/file/91227057822.pdf
    • https://interstudy.net/userfiles/file/2078556013.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/noxokibo.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160778b14b4f52---23729603993.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/39346508331.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ut2g02vvhd9oi1s6kf52q8qiro/13277291657.pdf
    • https://torbay.ru/images/uploads/file/nubemapim.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856acd72b39---feboxoguzitexeponival.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/o7t08brss6uvpllekdtpc77but/vivufisufege.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/9nfptdbfojgjd7ibuuu8ssvrva/36833465198.pdf
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/mesolojabegufukokidokit.pdf
    • http://yao-cheng.com/uploadfiles/20210617202229.pdf
    • https://sport-jicin.cz/dokumenty/getojifujojegeb.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611aa1f4279d0---10382686053.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78189ec432---28906541346.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=notify+fitness+for+amazfit+pro+9.6+8+apk+mod
    • 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_off00010cbe.bin
22b0ea3a3b836acda45c73c3cc953e13887ab7b4aa9a0a6df33132a91d1da2da
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBE 17936 bytes
font_01_sfnt_off00013c04.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C04 16792 bytes
font_02_sfnt_off0001541b.bin
93f2a9d8fa0851225b70898ec6345cfa91ec74e1461c6ed2639863df1818c672
pdf-font-stream PDF embedded font (sfnt) at offset 0x1541B 11468 bytes