Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bad06b426d67a9d…

MALICIOUS

PDF

80.6 KB Created: 2021-09-16 01:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b032a9a5f38a68218999c98004b54982 SHA-1: 5b2e4058794728799e3c65e46b5d721ce8af6034 SHA-256: 6bad06b426d67a9def8a3f2cbd28d620795167d1885e1cc842949368c128a2a4
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa7ee84c04---wadagagimuvotifotesikuja.pdf In PDF document text
    • http://roycraft.ca/userfiles/file/75809766101.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/091327fa7528e731896995b29bc1478f/24645206701.pdfIn PDF document text
    • https://kotata-zlin.cz/obr/clanky/file/zufatuwezegusodagumi.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/36874399172.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/tolibubawewegipodafowivef.pdfIn PDF document text
    • http://mbfeed.vn/upload/files/vefak.pdfIn PDF document text
    • http://nkmate.com/FileData/ckfinder/files/20210903_A0028417CACC53C5.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/78489557519.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210901084549282.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/dojezito.pdfIn PDF document text
    • https://adci.vn/data/upload/file/desosegamute.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/17619382231.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/woredepagoxevumu.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/55111106815.pdfIn PDF document text
    • http://maulich.vn/attachment/files/15914673644.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/782558318.pdfIn PDF document text
    • http://dentistturkey.com/image/files/zopetusaxarimidite.pdfIn PDF document text
    • http://potya.com/80315705622.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/23460995296.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141af1057a26---risowoxiro.pdfIn PDF document text
    • https://ms2oke.com/contents/files/poziparor.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/volepojubawugen.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/90416356297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=mathcad+radians+to+degreesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74D 10596 bytes
SHA-256: 6877442b22cd0ed679da6b9c66102e8e2405755165f9dacc10c193257f55ae7d
font_02_sfnt_off0000ff42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF42 20572 bytes
SHA-256: 9f16b86157a0a43b6dd07a6f871662b15193e656faeda68f71e91dbcf1f58380

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