Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c954105e0156c9…

MALICIOUS

PDF

75.8 KB Created: 2022-05-29 13:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: c27ce76c94d32a0dd5c6b4e7437f0ba0 SHA-1: 80ba1a25003e5a7878858b9bef2822b383a73ec3 SHA-256: f7c954105e0156c936fb663b4ed044c8e7323bd6bee095a7d10e5ea8981c7700
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document exhibits characteristics of a malicious phishing or malware distribution attempt. It contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary attack pattern involves redirecting users to external URLs, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://sunuf.co.za/YmrXLWy8?keyword=titolazione%20acido%20base%20esercizi%20svolti%20pdf%20gratis%20per%20del
    • http://olivetheater.com/userData/board/file/vekidalasobexaguxek.pdf
    • https://iohrp.org/f_files/files/xafapepususezitip.pdf
    • https://tezewudewitifu.weebly.com/uploads/1/3/4/5/134524208/niredazadofibi.pdf
    • https://bunoworerut.weebly.com/uploads/1/3/1/4/131438217/terudiwulivusuzozi.pdf
    • https://terracell2.terracell.pt/images/file/gepejesejidejogezogevebo.pdf
    • http://rostocker-taxi.de/resources/files/mutujujibimemesuwefupuro.pdf
    • https://setojeduvesile.weebly.com/uploads/1/3/4/5/134587971/kowosikisa-vesub-jusojufor.pdf
    • https://fotojursa.cz/userfiles/file/3589794648.pdf
    • https://fufobulevuzim.weebly.com/uploads/1/3/4/6/134650144/dobaripedujuwuf-bogedefafufi-fegavaxo.pdf
    • https://zuxolawez.weebly.com/uploads/1/3/4/1/134109286/gadajudikixoroz.pdf
    • https://safagaxoxikow.weebly.com/uploads/1/3/4/0/134096848/6314ded6d5d8.pdf
    • https://tedesco.pl/userfiles/file/parozufapefotageweti.pdf
    • http://contactfm.be/userfiles/files/vobaben.pdf
    • http://qwerty.pl/_data/file/54656941570.pdf
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/bimob.pdf
    • https://papadapogapov.weebly.com/uploads/1/3/4/7/134706375/degiwov.pdf
    • https://nebujabes.weebly.com/uploads/1/3/7/5/137515718/5662755.pdf
    • https://e-room.co/userfiles/file/bikusutekepaturarejaku.pdf
    • http://alhegazgroup.com/userfiles/file/bemuw.pdf
    • https://xuxavapivobe.weebly.com/uploads/1/3/4/5/134590147/kidexetodabapob_suwuwebabibi_xexakaz_vizuv.pdf
    • 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_off0000bf01.bin
b4d7cd9e1d87e8ff62c3d374d9195c3f37df586301fb461f7efb03e63f0b31b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF01 18316 bytes
font_01_sfnt_off0000ee45.bin
7fef6b2f0692cb633ac665027e7c14c973bd6a5e25371d221771f8c67f988dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 11024 bytes
font_02_sfnt_off000107a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A9 16792 bytes

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