Malicious PDF — malware analysis report

Static analysis result for SHA-256 032a078b2e016791…

MALICIOUS

PDF

93.8 KB Created: 2021-07-04 22:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: aeac27a97dd03f9c6483657f3e755c14 SHA-1: dd15dd5d0b75f0b46df525aa70c024a660ee3fb4 SHA-256: 032a078b2e0167916eefc1c01750bc36f77f468482abc10dc514a431ec98a7b3
196 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a remote-support tool lure. It contains numerous links to potentially compromised or disposable hosting sites, suggesting an attempt to redirect the user to malicious content or downloads. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://tgtech-auto.com/userfiles/file/89546936961.pdf In PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/1ef8aa3aa333bda4dd21d949499e0bdb/99634072629.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/81717034031.pdfIn PDF document text
    • https://rosycaffe.com/file/polazugu.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160c44364730bf---vixeresefikatasesabotik.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073fd5fd8673---fipodemavepubofajatelaxi.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606caaac37f66---65542024045.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a7e8a7c24---bomabegala.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16084d24301e8c---99614936637.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608817989cb1b---kotozewizudu.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/697f6c1669ca936d111fa5eb54959ddf/6220327200.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085c67fe54fa---30753757926.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/xulodojotugutusepi.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/piximu.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/61319286775.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/kikf5ed19o6a8fh5rre7tkqv09/javufidatub.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dd4f2e4f0---39167603877.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607a288fcd9ba---8299144935.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202106file/2021062621270470554.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1d5f9868a---nabubaronamaromaxasida.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087238074b6d---nojux.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/62aa440c8e98859c5813ed14c7bdc884/93988054911.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23b720029a---pufidogosolu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=scary+haunted+hayrides+near+mePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF1 10760 bytes
SHA-256: e81a79e18f743575638a21b7e4e9cd5f3ee9a3393acfc0de03450cb2428ff0d4
font_01_sfnt_off00012381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12381 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B93 17688 bytes
SHA-256: 5103609a08f72151adedfa35180684a84e0afebfd62a7b0c759dcbf5e08e5191

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