Malicious PDF — malware analysis report

Static analysis result for SHA-256 332ba3081780b9e8…

MALICIOUS

PDF

80.7 KB Created: 2021-09-21 17:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25bbbc0ec5974586d6bf07ca49fc9350 SHA-1: eca8a4ccf6ee75306af825c6bd90b79505984968 SHA-256: 332ba3081780b9e8a58cd8118f2341a0b34990d3619a58b70fecf9fdbd13c955
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of a link farm and a callback lure suggests a phishing or scam attempt designed to trick the user into visiting a malicious URL or initiating a fraudulent communication. The document's structure and embedded URLs point towards a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://tsydesign.com/userfiles/jws/files/gefoviluvaxoguzaledegu.pdf
    • https://mar3ol.com/Files/files/lebukesuralodefiraw.pdf
    • https://clubsecurite.fr/webroot/upload/files/kexiwezamidevepabujipozoz.pdf
    • https://silverbirdmarketing.com/pages/images/file/15409216854.pdf
    • https://atiksigorta.com/files/12739798584.pdf
    • https://vanchuyenduongsat.vn/upload/files/sanezixifaziwalumisuluga.pdf
    • http://ngor2-3.com/file_media/file_image/file/7762301633.pdf
    • http://franceplus.fr/userfiles/file/zijiwimaxakabi.pdf
    • http://jujucuisine.com/userfiles/file/43297257504.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16141b024a95ae---42913086726.pdf
    • https://nusbetaja2.com/contents/files/gurovepapesufe.pdf
    • https://stop-remont.ru/ckfinder/userfiles/files/netagivilesoz.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/58889055884.pdf
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/wowazozozov.pdf
    • https://9ja-bet.com/userfiles/file/sureveso.pdf
    • https://samajsutra.com/userfiles/files/kidirabuwa.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/a9bd97bed8fb39cc23b74cc2f8bc3519/99229521306.pdf
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/22545801896.pdf
    • https://trystsalonri.com/images/file/82358481068.pdf
    • https://datajournonepal.org/files/faset.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161441534df32e---bozopepafeke.pdf
    • http://sireny.net/share/files/21729037180.pdf
    • http://misr-consult.com/userfiles/file/sinizamamimovi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+know+if+someone+is+looking+at+your+instagram+profile
    • 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_off0000d293.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD293 16792 bytes
font_01_sfnt_off0000eaaa.bin
b2987a414e2d28283dda42ad0337266bd60c875bf3e319d2163af86d465a11f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 11084 bytes
font_02_sfnt_off00010488.bin
d69cfbdc8dbe92f94f19560240e488a3be37cab8238876456351300b60b7fdde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10488 18480 bytes

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