Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c772d248668885b…

MALICIOUS

PDF

90.3 KB Created: 2021-06-26 20:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07cb0eac43d8630f3e2041094abdd25a SHA-1: 0cf011508decc38b2367d37c345010186af1bdd8 SHA-256: 2c772d248668885b6919f33de9eafe8e7d7c9e7efbb83afefbbf47bdee8e7a1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many hosted on compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://tecsun-moscow.ru/docs/file/35850139978.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/b34c3c4eabd0ef6b02c5951585b8b1a9/98286881720.pdf
    • https://mk-sito.it/uploads/file/sizovasokegomerevilorizo.pdf
    • https://iwnta.com/userfiles/file/kizadatuxuz.pdf
    • http://esoftland.com/userfiles/file/gokurep.pdf
    • https://mszukam.pl/dat//file/xupidifowote.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/1c8d80999da0e21e61427fe317a010c4/gejabe.pdf
    • http://ampletrekking.com/userfiles/file/71585244908.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b733351d701---83524972596.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/7fc4e51cba5199233181d4682b0a91b1/kogesipuru.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b78e74175---luzilotodifolowad.pdf
    • http://kutyasturak.hu/images/files/20263921796.pdf
    • https://weyergans-hcc.lv/userfiles/file/tawumipazekifixifokejefi.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074c1657aaa0---jowudenitijijonegexu.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a15027f37---28192229997.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a304e7129---2427242529.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d20fc36bb---2671337905.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608198602d3ae---84744917809.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/nu4la08k104m51s4ihom1p5oic/6488417797.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098afdc2bdfd---milatomamufefomelugiluw.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607508b637e6f---75626053624.pdf
    • http://arcomproltd.com/userfiles/file/nisuderima.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/6faff530598a4391d46f642254f6f1b1/lefuwisumepunuti.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdc6a0391a---kelomafugopovup.pdf
    • http://merlegdoktor.hu/tmp/wopesodetulu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=protein+kinase+c+is+activated+by
    • 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_off0000f979.bin
7bd5f2e1c1d8e054912b82a0fea72a8d807c967bb36f6f198746d8e597e56d8d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF979 18660 bytes
font_01_sfnt_off00012afe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFE 16792 bytes
font_02_sfnt_off00014315.bin
8a78f7675d83dde811bceb265d9f97d6be9c4441cbecf953ac09fec73abeb241
pdf-font-stream PDF embedded font (sfnt) at offset 0x14315 10728 bytes