Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bd7342c8176254…

MALICIOUS

PDF

74.2 KB Created: 2021-08-06 16:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f77315dfc0dda5bf5e00f6d9fc279162 SHA-1: d58189fde0709139935f7bd604fce3a9542bb730 SHA-256: 74bd7342c81762545daf526ce73c0db1e78d28150b030177b5bbb7f6317b7252
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to numerous external URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and a link farm indicates a likely spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://primaneighbors.com/userimages/xadolerufemolas.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4c3cf5310005fe8dc596fca519e03f80/monorexuvigijakojawet.pdf
    • https://maydangson.com/vietkiendo/upload/file/67059413242.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/501a6a5df1c1e185daa50b1affb67c4f/10113164748.pdf
    • http://ebslang.net/_UploadFile/Images/file/lejisolagufanenowenuven.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66cf578a07---40883637541.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/vpbg07v218m572b3qj42q0a8gd/jateromakepewebuvufirevev.pdf
    • http://krajinar.cz/soubory/files/76736884556.pdf
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/rajijugavu.pdf
    • http://travelci.ru/ckfinder/userfiles/files/mutijumuse.pdf
    • http://tizianaiberti.it/userfiles/files/juzaz.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160f9707dc4cb1---61474869450.pdf
    • https://bancodevida.com/bancodevida/admin/images/image/file/ginekasido.pdf
    • http://files.ibiza-ferien.de/file/13492210904.pdf
    • https://adikkedua.com/contents//files/kenofof.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e8fd2b4409b---rubexonovivejajovawi.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/2a52872edd41c4cc74485e15020a788a/taximoxogegilalenura.pdf
    • http://myjobcareer.net/userfiles/file/2021060123050873499.pdf
    • http://skybuildinfraprojects.com/uploads/11987658450.pdf
    • http://abwjefferson.com/uploads/files/maxuputapubifud.pdf
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/86372243561.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/d0961dc795a6ee7e9497522337f12a3f/tadugeg.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/c44ce23db85c1ed0a8a49ccf66e45b89/19099282091.pdf
    • http://thecrayfamily.com/clients/36408/File/95545001289.pdf
    • https://fsreloading.com/userfiles/files/95036906845.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=too+much+too+many+enough+exercises+agenda+web
    • 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_off0000bd12.bin
226e84e1772613f593c6ba4dd022182595582368f02785a451ed8e48147e78de
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD12 11276 bytes
font_01_sfnt_off0000d749.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD749 16792 bytes
font_02_sfnt_off0000ef5b.bin
4af531812377d11575342e890f95faf6e672e696125a82eab6a51e96f6711515
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5B 16580 bytes