Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ed7183429a7adc…

MALICIOUS

PDF

80.1 KB Created: 2021-07-26 02:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f7bb9707d5c1bc94c57874176059c979 SHA-1: ea9e9669905244f9a72f98621c15c1606555f3c7 SHA-256: 83ed7183429a7adc34287c17170437f38f451a4f7e095ab4345acf197b31bf93
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple URLs, some hosted on compromised CMS platforms. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and link farms suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7089

Heuristics 5

  • 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
  • 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://vansuloi.com/uploads/userfiles/file/58047319122.pdf In PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/lazevopudasosadoxixe.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/ropixomavifizituwizo.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/geguk.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/79168526343.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/lp4igaue5rojkakvu7132qim5b/wavoxojikivusugijozi.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160c898c9df210---15791485941.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/nifufopudibivenivig.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/56e665d2a545859f954066403a8aa403/tofowizegemoro.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/krk9n70gev89gtikb9so8hcq7b/98316480222.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/birinekid.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/29pcccvuurvifit6u3prsp0jt5/2432314215.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/35523582430.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/4beef96cd6b9ebaedea5a1a67c5f1e42/72414149051.pdfIn PDF document text
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/bowovim.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/xitoluwifugefis.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/906aa17d7000ee18fe7a48b5e1cbd9be/30759715764.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba07ed3e23f---37555985307.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/ludejekugomuterusofoketov.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/2144558e341acb73a77f08d1ba33264b/82195679811.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/xesox.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090904bc5726---732625228.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/juxafesokugujevaje.pdfIn PDF document text
    • http://strandedtattoo.net/file/rawavekepuwala.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/sozawiwemalivegexol.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/08449f6b52574bd9a35528167af96f40/74227244528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=activador+para+office+2016+professional+plus+64+bits+gratisPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 11620 bytes
SHA-256: fc18c645a4751b80bd26644ce73115f108f179041dce5760ddbd754bcb39abb5
font_01_sfnt_off00011261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11261 17988 bytes
SHA-256: 7d63e11d8d2fb0e0590b7dc4ede23c6839fb96eed9bb7f0ed2ee1e813f2cc110