Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4700f5e718ad183…

MALICIOUS

PDF

86.0 KB Created: 2021-07-25 23:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b1b860d03673df3d30ea972e9642d444 SHA-1: b210ade5e6fe28a710a7b6ab6b132428b2722a97 SHA-256: b4700f5e718ad1832f520771ae61fec6f4fc2732cfc788abf5e284015a8201b9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to manipulate search engine results or distribute further malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, supporting its classification as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972467258e5---21894509125.pdf In PDF document text
    • http://danies.ru/ckfinder/userfiles/files/71475280014.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/99576209342.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071915699ed5---zaguke.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/suzulaju.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d31043f8a---68166636928.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/27356226585.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/gigakufut.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609feedab42fd---sujemedivumuzuvi.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/e91sr4m14j4n4m4pp72krcuto0/novozoragapoj.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af86f38440c---60087079560.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089917e4319d---rozevex.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081c3f9b9515---kigoregebosada.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/64116962350.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/rurfub2cs32j4d9nchqba74a2j/13509989420.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/a6395a6b6b9a89394238596d85cd03c2/33309443260.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/wimuzowijoxuwibixigo.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/20659963529.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/18032593447.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/71014762685.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/78374280277.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/roroduja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=dil+dhadakne+do+mp3+song+download+bestwapPDF 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_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 17096 bytes
SHA-256: b69903450b923a278c36b3eb3a6bc3b6b3cc809125cde46d7f70da77036efa2e
font_01_sfnt_off0001188e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A5 11232 bytes
SHA-256: a37e00bbc07a6b2599dfd21fcc2ab2a16d399d87c2c995956c616733c99298eb

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