Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbcd0ed380da13f…

MALICIOUS

PDF

83.0 KB Created: 2021-09-18 09:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d3ee56b13223457aa046f90fcddf7357 SHA-1: fd31b0b5620caa66237d967a392a97d5ef718135 SHA-256: 1dbcd0ed380da13ff3f86e8606e9f6c75767b7911c3b5e819c1025224b904cef
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains multiple heuristics indicating malicious intent, including ML classification, a payment redirection lure, and a browser extension installation lure. The presence of numerous external URLs, many hosted on compromised or disposable domains, suggests a phishing or malware distribution campaign. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://allytemp.ru/uplcv?utm_term=transfer+data+android+to+iphone+after+setup PDF link annotation
    • http://houstontca.org/Content/uploads/files/80232844566.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/kasowowevam.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/42489970274.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/gukozulozo.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/fenetunamuzit.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/wenapo.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/dofedadukowogudatunof.pdfIn PDF document text
    • http://js-space.de/userfiles/file/42875479232.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16140b2cc69be7---negarulowofagir.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/76818124182.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/baxobidijeku.pdfIn PDF document text
    • http://hongdacable.com/d/files/31738060906.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/jovif.pdfIn PDF document text
    • http://cartopack.com/Images/file/25378541373.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/xupetozozozobavadom.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/15984438074.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/74859451664.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/pekuzof.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/48273959527.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/tuwemusafolitumomopu.pdfIn PDF document text
    • https://85097781.com/upload/files/mibotiwusot.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/bosogoniv.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/7d5e278b5ddc85f16eb00d22eec3025d/71705813256.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/770aa4e507322a7c65ff8e9d000c5a35/52192376341.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/22692501035.pdfIn PDF document text
    • http://mebco.ru/images/file/xugefimizupuxa.pdfIn PDF document text
    • 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_off0000ddc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC8 10612 bytes
SHA-256: 4e0553d78c2ce0220cba235cd4c7cf8412aab8f67a3399f2c397244801fecb56
font_01_sfnt_off0000f5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0B 18560 bytes
SHA-256: 3c43d165d60210dd0473b1a9ca535331b9ebbfd1c7458e65ca7f7ff9dcea7ff9

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