Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1419b164940d7f…

MALICIOUS

PDF

85.7 KB Created: 2021-06-26 23:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e5c334d63ba2aa7a3a8988d64d9315c SHA-1: 444d81afaf604caf75f485696c9c27c9e620e177 SHA-256: fa1419b164940d7f24199c538a98e8bba08c1993af96bd9d27a9ad8c7ae165ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

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 https://pistant.ru/uplcv?utm_term=28+day+cooling+off+period
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/9dd66e704d51185844ca990861c5c481/kosibojerowetiwaboxizor.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d10da7db93---bevavurojapinoro.pdf
    • http://sbstroy53.ru/img/files/jofinitikebugilofemo.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/oi8o0d43flh55e1i925m243sjq/resebexezafunix.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/pv451t9p6g9cgilkv0tum20ceh/lovewepuxifefalerunat.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a53b2b1026c---78126415728.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/msqdouqgj7nvglpq1e752bpcc0/14301266698.pdf
    • http://studiogallerani.it/userfiles/files/negefapikimip.pdf
    • https://fajndoktor.cz/images/file/files/takuvugojokibulelugu.pdf
    • http://bulk-supplies.com/userfiles/file/92217470087.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/67790526fa235f06d082b5161437126b/5355980268.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/ee53607910edd72db1adcbd015051e5a/72472291357.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4e01c61fb---33807968488.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90894c467---nuzaxobenopomugiwifuxogu.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/pltpl05vgkmrlotign788jp2mc/85198746186.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd1f260bae---99808107338.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/099c96f33bb69850e294c7c0cb8d706c/19527335544.pdf
    • https://a2designbg.com/userfiles/file/badukelu.pdf
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/66352393568.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6d47668f7---wozuzodojekasu.pdf
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/xirosupulafonidusu.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/2inbu06mseclvr9vtut8focrf6/sefodivomube.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160761fa6df6be---gikuxa.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/e5a8ca09bd0b7a5b153163393c1f9b38/kanakibunutugapon.pdf
    • https://majorsagilekvaros.hu/uploads/file/dapujapixamegutulakojik.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_off0000ec2d.bin
c7346ca5cddf78b0a6c9c595af25a92a338286ce28cb494b8100cc22a2279986		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2D 16540 bytes
font_01_sfnt_off00011719.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11719 16792 bytes
font_02_sfnt_off00012f30.bin
ea80b5259d3c0537049c306582018ded0b733f56ff926cd0631f3e6fc399ea26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F30 10872 bytes

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