Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45ae2678673ae99…

MALICIOUS

PDF

81.2 KB Created: 2021-09-23 05:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e2c8f144e07148943a7d096f12b2b7f SHA-1: dbc324d6100324d761b580de8d1a297cd67ee313 SHA-256: f45ae2678673ae99422b6d34fe0954508c5c1fef43fa9f1517f5941495b23edb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://allytemp.ru/uplcv?utm_term=data+mining+for+business+intelligence+2nd+edition+pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/54994152157.pdf
    • http://torgoborud.org/images/file/47598342068.pdf
    • http://lawngo.net/fckfiles/3009316821.pdf
    • http://vyveva.eu/UserFiles/File/zutebej.pdf
    • http://baltyk.recykling-rejs.pl/imgturysta/files/gusanugalusofirelapizatil.pdf
    • http://timnhanhonline.com/upload/files/katimekixadagizaj.pdf
    • http://ros-grad.ru/fck_editor_files/files/26338666204.pdf
    • https://esvigo.com/upload/files/xisumazakemuwa.pdf
    • http://viajaconsciente.com/imagenes/userfiles/file/19120849940.pdf
    • http://imssp.by/data/images/fxeditor/file/12635717041.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/02ctoh1leb43hk48h4votqmc27/59145630795.pdf
    • http://tdbm.vn/upload/files/bolafuxokoxot.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400d23761a6---jesisumumawubugurun.pdf
    • https://unifor975.ca/userfiles/file/75883499181.pdf
    • https://eghamatkade.com/basefile/eghamatkadecom/files/filelibejotibo.pdf
    • http://chickenwild.com/upload/contents/images/images/23445094618.pdf
    • https://autosaloncenter.com/uploads/files/1543957630.pdf
    • http://exosushi.com/uploads/files/11087939145.pdf
    • http://obedovice.cz/userfiles/file/giwilatusun.pdf
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/zubunadutidoro.pdf
    • http://countryclaim.cz/userfiles/file/7464425250.pdf
    • https://livres-arts.com/ckfinder/userfiles/files/rojonazexugitegux.pdf
    • https://phuketwebstudio.com/ckfinder/userfiles/files/94580537784.pdf
    • http://salamatekhanevadeh.ir/ckeditor/files/files/41959957068.pdf
    • https://museuminiaturesbesalu.com/files/tadit.pdf
    • https://netwindowvn.com/uploads/userfiles/file/19021680760.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_off0000d4aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AA 16792 bytes
font_01_sfnt_off0000ecc1.bin
687ccddb8c56d7f6a13fa89c3f83c59c54db1dd45244d4c60d6c2e37891f54e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 11324 bytes
font_02_sfnt_off000106fe.bin
9ed7d364250abaa3c294ded9b7179becc613795f7db0ff05c03e357734495c4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106FE 18208 bytes

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