Malicious PDF — malware analysis report

Static analysis result for SHA-256 3625418f35197625…

MALICIOUS

PDF

85.8 KB Created: 2021-06-28 20:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a63a9bfa438b6bf7f90e7e77ceea5ead SHA-1: bbf430d8149ec37f33e9c5c190d0513a8c7049b3 SHA-256: 3625418f351976258ff57234c8cbfed3094e522d3b06b75f9c5008374711c75f
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the overall structure and URL analysis strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pileshoppen.dk/userfiles/file/zavew.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/l546v2tn23g57kt22ob48r55q4/siwuk.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/fa91uhf6e30d176075f65gpvg2/pesejopoxo.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/4gjk6k97lhv9gnrp5ed61vq4b6/bopip.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41c1d4c4da---sunoxowezofiro.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/9aab31679762661e5dc36944c447eb3a/tojapuxijamoguri.pdf
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/65085160689.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/bd45e0c2ab4d16ba2d4e43ee92764bf7/60695759752.pdf
    • http://alwaysfavorentertainment.com/clients/879371/File/83946020434.pdf
    • http://rghsalumni.com/clients/82979/File/benexutamoxirul.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aace098a4bd---99120456470.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c48f2d666---gijawumufefodalixovise.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/b53d609076940e962572233c672b312c/3194939417.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c756e3e3c19---monalijelibijekuta.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/87764587808.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/36c36484e1b60609be4806d79cb20285/72091227393.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c7149fee5---90190602345.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/er0n5qt8rv1dcfssjv6actkjj1/93285645135.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/a1c97f1c07fdcad908f36cf71a3a60a1/83156005983.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/eeljdrbugnld846smg5bo74l9t/lekisolawar.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608010218402c---tutag.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/bhtqntjk3sfpca9nd8ufv0mh3j/sowatuganano.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/75594136989.pdf
    • https://lecachet.fr/docs/files/ripazevovinilotadapinubu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=definition+of+the+word+virtue
    • 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_off0000ee79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 16792 bytes
font_01_sfnt_off0001068b.bin
4e8d302d534ba599835c9ad7e30fdffa95f169566da3846536efb9d96d725d11
pdf-font-stream PDF embedded font (sfnt) at offset 0x1068B 16952 bytes
font_02_sfnt_off000132d8.bin
f3dc082f0ccba98fd46e29ac2d1d525599f7e46a1b9dc1ff6567bbfdd9ef12e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x132D8 10328 bytes