Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab3159967372806…

MALICIOUS

PDF

72.4 KB Created: 2021-09-01 14:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 172fb17562974b30fc7d8e9b117bb3cd SHA-1: 3341db5ded0eac22733b01d4a5d28bb3a3947db5 SHA-256: dab3159967372806ceaeaff93ddd62231a56268605d9d742886c75666680ee9c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites that appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to direct users to external content, consistent with phishing or malware distribution tactics. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://biemmecommerciale.eu/userfiles/files/devunukel.pdf
    • http://duancanhotot.com/upload/files/rofadokulexobodofuzajajag.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/4gqrrq89rs402aeq7kllghe1k9/24502512716.pdf
    • https://dailyiat.com/html_upload/file/1073735149.pdf
    • https://terminal.hr/userfiles/file/12490619650.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cacfa5e80---dakuw.pdf
    • http://goldartline.ua/userfiles/file/10868880598.pdf
    • http://asiavent.com/UserFiles/file///momutuzawuriguko.pdf
    • http://veribase.com/E/file/63069857355.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/4n3tr39fg7ug166r0k9jhhdnm5/16953550609.pdf
    • http://sabaispa.net/userfiles/file/tefafufanusovo.pdf
    • https://bishopsalamatkhokhar.org/userfiles/file/98062603479.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/ad7e4d47544453451a8aa4ff849bed16/83089077497.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ea726f988---11120531948.pdf
    • https://kientrucqhouse.com/uploads/image/files/11210541199.pdf
    • http://hoangduy.vn/vn/files/16637418499.pdf
    • http://classicalgardenfountains.com/uplds/file/19345171495.pdf
    • http://softtox.com/new/userfiles/file/bilotejoxijej.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/f12db2238265292d830d5e19e15e0e98/96168302720.pdf
    • https://dewalt-naradi.cz/media/upload/editor/file/mijuxugudidive.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=social+media+manager+interview+questions
    • 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_off0000bbe4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE4 16792 bytes
font_01_sfnt_off0000d3f6.bin
f35bce3157eb4dd31bf49efa2afe54d505d7bf551cb1656ddb443eeda6a62a51
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F6 14880 bytes
font_02_sfnt_off0000f94b.bin
f4efcb3d10207abe4b199d165c85f924b0fb40f1aa1ce7c193924cc140367851
pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 11188 bytes