Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d494d3193bbbc5…

MALICIOUS

PDF

91.3 KB Created: 2021-07-25 08:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13557ab7dbec4b213dc67323ebc44270 SHA-1: 79194c440182ecc4c10b8fbd627d085baba4de75 SHA-256: 02d494d3193bbbc5d7914b696f0eeb2fa961a32cb1c52ef7db0f6a3c58382659
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan distribution. It contains a link farm directing to multiple domains, some of which are hosted on compromised WordPress upload directories or appear to be disposable. The primary function seems to be redirecting users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://kondicionery-ivanteevka.ru/upload_picture/file/geporupobojiwumid.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160784edab1c01---55925227933.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078f10b43c30---wosilisifefopu.pdf
    • https://amatnieks.lv/pictures/image/jefomisureve.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/2d31aa285b6bb8cb8245547769488ff8/zarajafifij.pdf
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles//files/puropu.pdf
    • https://kvkumariajnkvv.org/singhania/downloads/file/ligabejogexep.pdf
    • http://gwardiajuvenia.pl/zdjecia/fck/file/zumozoxupixul.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb754918f5d---4406954537.pdf
    • http://feach.ie/images/uploads/file/16680014008.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/36ccff8c292498e0350b02da16e079b3/pafuziduja.pdf
    • http://project-lovcen.me/userfiles/file/83627421359.pdf
    • http://accessprecision.com/userfiles/file/12387754326.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a017bce5028---6219604769.pdf
    • https://balaji-technology.com/userfiles/file/66644979600.pdf
    • https://alzubidi.com/userfiles/files/52605532336.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/09b873cac312ebf372f2a19b9c85add7/liweluj.pdf
    • http://liebherr-tr.com/userfiles/file/puvujafidi.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/vqcpvaa9qfm433tkpdkc6eqvj1/bedapa.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854543f4057---danegufuxiwaxutuwog.pdf
    • http://mnwebdesign.dk/userfiles/file/4863301147.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/8820486979.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=knights+of+ages+gift+code+2021
    • 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_off0000f2a1.bin
64afc181cf734c6eacff806b90bfa26e3b6d586d5b72e30b68e878e639328f9d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A1 30064 bytes
font_01_sfnt_off00012c96.bin
2587b249559dea477aff57a2f53af8601c2a24d0ff6f9d4da25a1ab8f077ec84
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C96 10896 bytes
font_02_sfnt_off000145a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145A4 16792 bytes