Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0ab580e8f8101e…

MALICIOUS

PDF

88.4 KB Created: 2021-08-03 18:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f8f5ffd50c658f00c5b58392e8e09b4 SHA-1: 469b97b1da3584b3cafb486f77a2f0508e613a6d SHA-256: 6e0ab580e8f8101ecfdc39343edebf6556d4aaa714b0ed1d764ea12e683b280d
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised or disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.masozilina.sk/ckfinder/userfiles/files/84506202905.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a2dedf93a---39617509788.pdf
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/xitijiwetobutuguvozu.pdf
    • http://elite-nails.pl/Upload/file/74114766364.pdf
    • https://anakmeong.com/contents//files/xokivabusilifufemidoba.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610304beeafbb---bezurejavikifonid.pdf
    • https://vinadesigndanang.vn/uploads/image/files/95982004795.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb49ce4bdf---vusavedoratesiwatepum.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b190607b92---21680926928.pdf
    • http://www.tecnobor.com/ckfinder/userfiles/files/giregeguxexe.pdf
    • https://didacostruzioni.it/userfiles/file/larulogitufu.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922027a6c37---pukuf.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/bjeht6bcojga640ukr7irvqvt4/jukowelulokokarabusupof.pdf
    • https://raljob.com/userfiles/file/siwobatedile.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787866e5c82---medeviwasorane.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090796aaaba7---pusokagebek.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/721707d093c8dfcb8f28013baf33f2a8/88655315150.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160846d08a2b98---6092658134.pdf
    • https://questyme.ca/userfiles/file/91327782259.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/41709bbb92086567b6b068ae2cd2c5cf/xiwun.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2cbb8dfc---25101824842.pdf
    • http://hayatteknoloji.com/webimage/file/dotaxiw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=can+i+smoke+frankincense
    • 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_off0000f5a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 16792 bytes
font_01_sfnt_off00010db7.bin
aa6216db4da47b0abafd69b54f00c9aef5d3a6c4064e2317429f87ec8a8b7c11
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB7 17552 bytes
font_02_sfnt_off00013b65.bin
3c3607f7fe1b37f525d31de3fdbde392a44111fd451a6bb26fe7136593a6c7dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B65 10476 bytes