Malicious PDF — malware analysis report

Static analysis result for SHA-256 04122c63d11a9142…

MALICIOUS

PDF

69.0 KB Created: 2021-09-26 17:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef3fd4f0eaf087d7d7b6d3b55ea3455c SHA-1: 5df1bf4a46d9de4fa25360cccf2c2e7a51ff21af SHA-256: 04122c63d11a91429840088bbe1ceabc6cf09700fc5357f68f310bf7b6804722
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, with the ClamAV signature identifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://drafthe.ru/uplcv?utm_term=android+os+names+a+to+z
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/jnel2gbfipgochvfphlcoljcm1/19995500731.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dbe449041e---lodiluvatamokadomidav.pdf
    • http://lamorenj.com/userfiles/file/52098906319.pdf
    • http://protok.pro/upload/files/33005592494.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161416616377a4---5829173797.pdf
    • http://tecnoservizi.com/userfiles/files/90210617649.pdf
    • https://cncunse.com/d/files/keluwikeba.pdf
    • https://photojet.net/userfiles/file/gawudezep.pdf
    • https://www.profiemg.cz/upload/ck/files/38215856627.pdf
    • http://southerncross-ex.com/images/blog/file/91382636442.pdf
    • http://www.contectrade.hu/fckfiles/file/92828428215.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613a71d5a2bac---43425328531.pdf
    • http://www.beverburcht.nl/upload/files/teramokugo.pdf
    • http://slstudio.it/userfiles/files/17610147246.pdf
    • https://ismart99.net/upload/files/75744457587.pdf
    • http://etcad.net/np/upfile/file/piketefawix.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf8c2d68ff---50781114411.pdf
    • http://locthanhwindow.com/img_duhoc/files/desuzonunejanazifozop.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/73557825481.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137e5f427541---26484224134.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_off0000ac23.bin
6ecc25ce6ba41afc0021923b0d7718f274c896c41970bd08fa0a6a13fc2df429		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC23 16808 bytes
font_01_sfnt_off0000d6f9.bin
b645bcdd4f40df64a8c9bd7d23f0ef4684171cb82e031643f8ccd124219e27d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F9 10404 bytes
font_02_sfnt_off0000ee92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE92 16792 bytes

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