Malicious PDF — malware analysis report

Static analysis result for SHA-256 85fce2722e06bbe6…

MALICIOUS

PDF

81.3 KB Created: 2021-09-15 17:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: da83e5a6420ace8349a62d068bcf833d SHA-1: 9e3b8b7f996f844db74ab97d124ded0de2968a3f SHA-256: 85fce2722e06bbe63260b418441040682f8d22de3384d90bbfcd237c657721a5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://rungruangsteel.com/public/upload/userfiles/files/gupepoxudi.pdf In PDF document text
    • https://jahanchart.ir/data/files/file/vatevojalisaraxitim.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/lusavubuxiganepexe.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/mikodeva.pdfIn PDF document text
    • http://coniperfumes.cl/js/ckfinder/userfiles/files/womumigifufivowideti.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/gebilibokojibagukoje.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/21363037489.pdfIn PDF document text
    • https://abss.pt/userfiles/file/79355986782.pdfIn PDF document text
    • http://bbbo.handyfriendship.com/upload/files/vonopapiwomusenumoxatebo.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/13513066812.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/nidabopisozu.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1631461127.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/tojovixixajo.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/86750230785.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/rijen.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7a665e91c---sejuxulagebug.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/zegobobonakevomipofubonuf.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/23911735493.pdfIn PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/40107789498.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/vobatuwomokabexepelo.pdfIn PDF document text
    • http://erago.cidees.com/uploads/files/kiwoxopobodaxugovaruki.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/89888614858.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/supix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=all+the+basic+chords+for+guitarPDF 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_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 16972 bytes
SHA-256: bb06a7ced0f06b10e09c5498779a3616af67c3be129b8e33c7314c11a99378db
font_01_sfnt_off00010641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10641 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E58 10872 bytes
SHA-256: 1f68d2f029f9f3ae93cd5145e4013d7b38e47e2a1a543670e42ff323119707a8

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