Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0f2ce055067b3e…

MALICIOUS

PDF

81.9 KB Created: 2021-09-10 03:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e4414c79d7b02550f644a8681fb08ed3 SHA-1: 8c8e663b66baa88a35be610383880f51e7c158bd SHA-256: 0b0f2ce055067b3eab5c3828f0e2a6e63908f12a27d6917d83f5ee81cac9a78e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous links to disposable hosting and a specific URL containing 'gta san andreas full save game file download' suggests a lure to a link farm, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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.
  • 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://theorientgarden.iorderfoods.com/uploads/files/6244430457.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d5e6ae04b---zofemoxigapiti.pdf
    • http://szkolaprywatnaleszno.pl/userfiles/file/joxanimuxugos.pdf
    • https://machnik.net/ckfinder/userfiles/files/putowukumebupexo.pdf
    • http://homokkepek.hu/editor_up/vurowoxogujosovovepu.pdf
    • https://eastoncn.housemember.com/uploads/files/43901353725.pdf
    • https://krzczonowice.pl/gfx/file/58401760658.pdf
    • http://saraiaser.nl/userfiles/file/10688605510.pdf
    • http://agedwedfjtj.pretty-match.com/upload/files/50521787029.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eff253094f---76028254865.pdf
    • http://sushiosushi.com/uploads/files/82685976705.pdf
    • http://sanarina.de/ckfinder/userfiles/files/zagoxonunokatov.pdf
    • http://autoscuolauniversale.it/userfiles/files/geketezoligamakujejeb.pdf
    • https://dadrarad.ro/userfiles/file/kaxifo.pdf
    • https://triatlonshop.cz/userfiles/file/mofodeguzetapigezazajaje.pdf
    • http://worldprint.su/userfiles/file/62092741750.pdf
    • https://plantbiochem.com/ckfinder/userfiles/files/95162574748.pdf
    • http://ourdesign.hk/ckfinder/userfiles/files/77704756392.pdf
    • http://splhardware.com/UploadFile/file/2021090919335873499.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161323078acfd1---kobug.pdf
    • http://sinice-rasy.cz/files/file/54070630959.pdf
    • https://majubesar.org/contents/files/bopoledepuka.pdf
    • https://mar3ol.com/Files/files/18710396076.pdf
    • http://lawyergz.net/uploadfile/files/gixegevazovofisaza.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=gta+san+andreas+full+save+game+file+download
    • 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_off0000d8e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E0 16792 bytes
font_01_sfnt_off0000f0f2.bin
72980acac940b92408fa19d356d1b1c4ed86ef071e78e61c61f5b4f0b3e42799		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 18320 bytes
font_02_sfnt_off00011fff.bin
637b3a0945049b669b19ab533deacdd7a709ddf2e96500d91e63579f0e1fc21d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFF 10988 bytes

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