Malicious PDF — malware analysis report

Static analysis result for SHA-256 146dc5ceaf415260…

MALICIOUS

PDF

109.8 KB Created: 2021-06-30 03:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11447f7c9c63c75dc57e367e51998188 SHA-1: 8a0a0c266f252101ac8d340ea6245bb4e4b95bc5 SHA-256: 146dc5ceaf41526077ae82657c0afb9f7f14d8b292a776cbfbecadfe574c4ea6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites and potentially malicious URLs, such as 'https://irlanc.ru/uplcv?utm_term=sleeping+dogs+not+ping+hack+code'. This pattern suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://irlanc.ru/uplcv?utm_term=sleeping+dogs+not+ping+hack+code
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ufvrv18ek72e7s6cdpo72lk53e/12003632005.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/33cf6833246aa64e51c39ff37b98b537/100414254.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc56f327e5---gobovesulimutavov.pdf
    • https://beautyyaurient.com/editor_upload/file/jufabo.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/8e206d0cacdc810d69a00cf62ecb462f/volifi.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d174738e36---58492417354.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8e711279a---fexowekiduxi.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/ev58ckk38e3b7kgecsfbluqcrn/taxusazozidu.pdf
    • http://arci-mp.fr/admin/File/desasinisavorup.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160db29bf1d8e0---sukipelurozisomol.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/rlk5sd1o9epaho3l80mt79le4d/diwedasabatudunari.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/1np5kfcs7e04qqflcq1c078rub/33116077614.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607550e9c762c---dojadomaduko.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/bt00s7hlgmluk97m88n3ikvs66/kanavoxidolilenudamuwel.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/73k5f08t7h78vc5q1vbs5v382i/41635632213.pdf
    • http://matsonconstruction.net/userfiles/file/borininemupifepageki.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b21ffe3524f---43768052275.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/bff2581bf17860f1dc7764ccc3707006/57398583227.pdf
    • http://kennycojewelry.com/userfiles/files/202106/1624362627.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d1316d3eb---timuxogelitube.pdf
    • http://bud-drog.pl/userfiles/file/wadaxopesifakib.pdf
    • https://bravo-hk.com/userfiles/file/sasufizumofadalegenisuj.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a547a26b842---mapubuxolawipifiw.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/4qlbdcghgstqk7m4gj21u7cfnh/wipimid.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2403808f6d---66503611076.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_off00013dbb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBB 16792 bytes
font_01_sfnt_off000155d2.bin
5aa9c99d7642545301987392c8bb03ec8e336732ae9a3a4ed0ced364a22259d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155D2 10860 bytes
font_02_sfnt_off00016e9d.bin
3430c1dd555171c41cb14d11ad2d2854d419213e6745fd2dde3df14d0e5238ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E9D 30396 bytes

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