Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1ac9762dfd07df…

MALICIOUS

PDF

72.8 KB Created: 2021-09-07 04:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77254d6df97125a4dde36125df973523 SHA-1: c644a0ea00a2d99b5568d3540a02cfc59f5702ab SHA-256: 5e1ac9762dfd07dfac7c16d88362dd936a9eb3cacae59e5c8da2852d5a1368b7
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://animationcoach.com/userfiles/file/zaginomivalo.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/1c1751f13c42a771b9da8eb54e588ab9/koxoxejenumudomevoxodanub.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/7rdiaokk7olklo2ikef3fja996/10044530893.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/46eb48c8733476f912331d6028f319f8/tabufalutometutew.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/74a1a96a57a0983529f3fa5c9147b5d8/zinazebisuwik.pdf
    • http://benetworkingpro.com/ckfinder/userfiles/files/75905623460.pdf
    • http://2020kellyfamilyreunion.com/clients/1/1c/1c0e63424c3b5e20a3d858f77c59864f/File/57870281427.pdf
    • http://jatyn.cn/upfiles/202105/file/1620536057.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/eg9qjlvnrfojhvn056hkhvecud/dobanabetob.pdf
    • http://banner-ever.com/ckImg/files/61038638733.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8c9e0c151---fejemim.pdf
    • http://kartywspomnien.pl/uploads/assets/file/faradofasufavakulo.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160984a3caa182---22349739047.pdf
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/saxamopanat.pdf
    • https://astek-telem.fr/userfiles/file/vawedilizada.pdf
    • https://adepotcustom.com/UploadFiles/file/20210516050224154.pdf
    • http://www.salpasafarit.fi/tiedostot/files/jobudesiruvutuzosaxodig.pdf
    • https://thegioibaobicarton.com/Images_upload/files/vifewowudedutazope.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/6uc894mtlug0km5g37t9l2ahf0/fopiraxojagalugawej.pdf
    • https://dukra.sk/editor_uploads/files/26297331601.pdf
    • http://gsmontaggi.it/userfiles/files/75657484579.pdf
    • https://ikansambel.com/contents//files/12836908950.pdf
    • http://hiddenforrest.net/clients/76790/File/resejimoxusidupuzade.pdf
    • https://kuzeyilac.com/resimler/files/4198394728.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ndt+testing+on+concrete+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_off0000bace.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBACE 16792 bytes
font_01_sfnt_off0000d2e5.bin
3b496a30563cfb9188b719755129faa8598894f2875a6e60c6c60844c0dcf0e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E5 10564 bytes
font_02_sfnt_off0000eadc.bin
a334c4cf504ff766d75397f28659d95efe782b904509c03ce1e6d93337cec407
pdf-font-stream PDF embedded font (sfnt) at offset 0xEADC 16636 bytes