Malicious PDF — malware analysis report

Static analysis result for SHA-256 71362022340467f1…

MALICIOUS

PDF

80.7 KB Created: 2021-09-17 03:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4a413f4462cc8feedb7d4beb49259ef5 SHA-1: 4217fca52f11f5df0906d2c562b4188121758878 SHA-256: 71362022340467f193c98d715a059ad8eea7cb086f8a77fe4b1144d9b7af78b2
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it's a password-protected archive lure. The document's structure and embedded URLs suggest it's part of a phishing campaign aiming to trick users into downloading further malicious content. No scripts were extracted, but the overall pattern points to a downloader or phishing delivery mechanism.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b244c818d3---67899524699.pdf In PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/vowoxanurekubeniguji.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/32678585267.pdfIn PDF document text
    • http://dodogs.ru/sites/default/files/file/20559893603.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/zuribubudimorij.pdfIn PDF document text
    • https://recrut.com/files/files/33366984033.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea722db76e---53023299817.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/40063436304.pdfIn PDF document text
    • http://telecycling.org/files/file/5400150931.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/84116027491.pdfIn PDF document text
    • https://bepcongnghiepphuchung.vn/userfiles/file/zidegekisibabexe.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/sepanidosokusafekiwa.pdfIn PDF document text
    • http://orenprom.com/img/account/file/78597355644.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/golojilovinabafefipul.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/fobatine.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/68858012135.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/60550664055.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/71511475545.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/60445544321.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/48997184252.pdfIn PDF document text
    • https://testagenda1.myagenda.cz/pictures/editor/files/nosag.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/tusetexisinefilawukep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=calculator+vault+no+adsPDF 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_off0000d671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD671 18224 bytes
SHA-256: 796b09cd7834996fb670982c0aa3e87239a52191e27be7627869574116c824f9
font_01_sfnt_off000105ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E03 10336 bytes
SHA-256: db301e90f01e958c6f7a9131aee97f2c043aacc12dc1c59fbd2c0adabae0fa6a

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