Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6580724674b4af…

MALICIOUS

PDF

81.6 KB Created: 2021-09-19 10:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a373ab9bf97d2b939dda7e73c4849589 SHA-1: 049de2b89ded5a3295564b848ac28cbecce505f6 SHA-256: ab6580724674b4afc18e378de5438f35af7c01bd6f22fe568770742e0fe4914c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of external links and the overall structure strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://pixomot.ru/uplcv?utm_term=pokemon+go+how+to+get+free+pokecoins
    • https://marosme.ro/hirek/file/11174393207.pdf
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pedise.pdf
    • http://exhibitionchannel.com/upload/95636804712.pdf
    • http://ttlh.vn/storage/ckfinder/files/zagotibaw.pdf
    • http://abworder.com/uploads/files/51124388405.pdf
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/83949226792.pdf
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109042134011586.pdf
    • http://paulabenveniste.com/UserFiles/file/wutifexiveruru.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/76d8n7vs3goiej546ifhijdn46/99778616144.pdf
    • http://ebus.cn/up_file/file/samogisavogexibodixezik.pdf
    • http://autolavaggiocraparotta.it/userfiles/files/73338486144.pdf
    • http://lignumweb.com/site/webroot/uploads/files/3823942491.pdf
    • http://nuestratierrapremios.com/campannas/file/60409771455.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137fdcc4903f---37088460340.pdf
    • http://phutungtdc.com/upload/files/gidalajeduf.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/e3a4bad6227ba2d67b037a1b5b30d89a/92781339817.pdf
    • http://hotelpenza58.ru/ckfinder/userfiles/files/69083429363.pdf
    • http://sungwoneng.com/upfile_editor/2021/files/64585270350.pdf
    • http://arrhythmiaclinic.com/userfiles/file/20210914172244.pdf
    • http://snp-ent.com/files/fckeditor/file/194767197161371656ecb5f.pdf
    • http://studiotecnicomartani.eu/userfiles/files/moxavonorutodasa.pdf
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1631236745.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_off0000d8c0.bin
9273b2f82813b63fe4135e3dfa4a132c40a44f1a675c76f9f73814a9ad9c2e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C0 18104 bytes
font_01_sfnt_off00010793.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10793 16792 bytes
font_02_sfnt_off00011faa.bin
e46b27ab04f4e00b8dd3a3bed43cd57a71414a7fb92825992d554fd41b65bccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAA 10900 bytes

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