Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdbf04844676dfb…

MALICIOUS

PDF

68.8 KB Created: 2021-09-26 06:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 85eb5e7a0416911b434c114c75aa194e SHA-1: 525a589ab4ca67879ade016940170074cbec31bd SHA-256: 8bdbf04844676dfbb7f83655cb7246fa1d64257f51b8a726b8567ab454aa72de
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high malicious score. It contains numerous embedded URLs pointing to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates these links are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://orrizon.ru/images/file/kekevo.pdf
    • http://shangrilatheshow.com/ckfinder/userfiles/files/kawomup.pdf
    • http://viorina-deko.com/images/file/nesegotosikajutofevanov.pdf
    • https://alirezamirmohammadi.com/images/upload/files/mevuginufekufaxilenilo.pdf
    • https://yukkumpulgroup2.com/contents/files/xiketawazuwilebi.pdf
    • http://www.americaninvest.net/upls/files/viburokijozubil.pdf
    • http://sxhk365.com/uploads/file///54568552135.pdf
    • http://www.musicboxpiano.com/contentfiles/48337034324.pdf
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/sidolaloxexaxowosidufu.pdf
    • http://cgpreceptor.com/ckfinder/userfiles/files/78416546641.pdf
    • http://constantemails.com/userfiles/file/1632193483bobikixavuro.pdf
    • http://aylabawadi.ae/userfiles/file/papezezerere.pdf
    • http://worldnaturalfood.com/image/upload/File/limexudesuganajenu.pdf
    • https://discovery99.com/userfiles/file/zifikevaparikepini.pdf
    • http://biolabsrl.org/userfiles/files/52365647158.pdf
    • https://praktijk-fix.nl/userfiles/image/file/vovawemive.pdf
    • http://studiopignotti.it/userfiles/files/sugifijamolobarewepe.pdf
    • http://pwharrison.com/userfiles/file/47147103067.pdf
    • https://amadesafar.ir/basefile/amadesafarir/files/72969067254.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614fa8b95ab96---dinizatijazegi.pdf
    • https://digireg.si/upload/tokegeni.pdf
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/sorevikidal.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=mbit+photo+video+maker+app+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_off0000acde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACDE 16792 bytes
font_01_sfnt_off0000c4f0.bin
dbe477a16a412d12d3c09b0e6d1575c0da42b6b1e987156ffc2914aa6ee6006b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F0 15556 bytes
font_02_sfnt_off0000ebab.bin
3033ab0a2915add649678eb89314dd2442c87b2214cebf42d504e46cc5f20442		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAB 10864 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.