Malicious PDF — malware analysis report

Static analysis result for SHA-256 3958c33366ac66a4…

MALICIOUS

PDF

88.1 KB Created: 2021-09-14 08:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55db308f602dc5128f6e6e602c396f0c SHA-1: 0c1f864f5cf44d0ba4c2caad992093842f8a37a5 SHA-256: 3958c33366ac66a4bb7f11026dfae0e9b99f6ce888b02907444e6ddcb4417559
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggests the document's purpose is to trick users into a financial scam. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://warungmimpishio2.com/contents/files/lezeledetunotitiduk.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/105bef35cc8e1fa88688f5ca0a22a5e6/zulixuned.pdf
    • http://lobanowscy.pl/userfiles/file/sakupirawig.pdf
    • http://dh-cell.com/ckfinder/userfiles/files/genojaxakiduxuze.pdf
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/bunikuvomeviwiju.pdf
    • https://himalayanthailand.com/image/upload/File/sezazafasaxoku.pdf
    • https://confetti-seasons.ru/upload/files/59363939604.pdf
    • http://yucehukuk.com/resimler/files/mokogijinijibusali.pdf
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/61533084707.pdf
    • https://grup-insaat.com/userfiles/file/ketisir.pdf
    • https://transmilenio.net/datamont/userfiles/file/32406627531.pdf
    • http://www.fuchingrading.com/upload/file/nijosivibedezapil.pdf
    • http://studioarclab.eu/userfiles/files/85764771428.pdf
    • https://alshaabcoop.com/userfiles/file/87676903894.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/161366f7fe696c---kivedu.pdf
    • http://opusincertum.it/userfiles/files/9400966687.pdf
    • http://huabulaw.com/uploadpic/2021-9/file/2021091406453673499.pdf
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/54004047409.pdf
    • http://alpha-cp.com/userfiles/file/sogefiwuwegofuxoxuvemazo.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350ac5a26ee---kunuwelixupo.pdf
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/77609709811.pdf
    • http://www.puhito.hu/uploads/jemuvojedulubinabotunom.pdf
    • https://sklepbonus.pl/userfiles/file/95488701979.pdf
    • http://abbuffalowings.com/uploads/files/xoxuse.pdf
    • https://mysilo.com/upload/ckfinder/files/manupetuzixo.pdf
    • https://ajansnigde.com/resimler/files/88257447333.pdf
    • http://bellina.pl/userfiles/file/tosisirero.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=half+of+it+watch+online
    • 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_off0000f3a0.bin
dc7c84e97c1230d30735fc0fa3c23259c27fb3e0a42e1d24765b0414e88a9692
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A0 10244 bytes
font_01_sfnt_off00010a92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A92 16792 bytes
font_02_sfnt_off000122a4.bin
0a5c87f2b6f35386caba831a3e515bcbdaa5222a7808ca864c954ec8a6a50062
pdf-font-stream PDF embedded font (sfnt) at offset 0x122A4 18716 bytes