Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee057df254362d37…

MALICIOUS

PDF

84.7 KB Created: 2021-09-17 07:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 291fa17c1434425c7a527e4bdf51779a SHA-1: 73959c5ab13becf716ec42c457a704e9bb21a421 SHA-256: ee057df254362d37da4ca5c903491b173cfe7d010b60cdbd63d5337ae5e4e9de
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple disposable domains, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript (T1059.007) suggests the document may attempt to exploit vulnerabilities or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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://belovosushi.ru/files/68441549731.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/5219f8486480d8ffd88887cd17441c7c/21650490618.pdf
    • http://www.sudaff.com/pics/file/bekalunufunoxibajuxene.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/dunewukopoderodiwediw.pdf
    • http://28777886.com/Lpf/UPFILE/userfiles/files/55334037387.pdf
    • http://ohxto.com/uploaded_files/userfiles/files/80686089428.pdf
    • http://sampoernastrategic.com/uploads/image/files/17941728746.pdf
    • https://worldcastlive.com/userfiles/file/fizobenobelu.pdf
    • http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/86690759296.pdf
    • https://serrechevalier-skifun.com/imagesfile/87595414402.pdf
    • http://bangladeshceramicsociety.com/uploads/editor/files/dibuledarumedemedotipe.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c71873a373---menobinabawabizanufubuz.pdf
    • http://metisentry.net/ckfinder/userfiles/files/satafubugitar.pdf
    • https://landtop.com/filespath/files/20210916203823.pdf
    • http://longarmacademy.net/fckeditor/userfiles/file/joxozavivavozetebomigobi.pdf
    • http://srs-budapest.hu/uploads/files/tikasikuvukolufakelaxepub.pdf
    • https://tspinstruments.com/cache/fck_files/file/rozopa.pdf
    • http://xn--80aafbladvtgxneccoge3bt.xn--p1ai/pict/file/jamojofukatazaza.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143cf3820ebd---novudawimomupuwafe.pdf
    • http://www.masozilina.sk/ckfinder/userfiles/files/64426892058.pdf
    • http://spc1991.com/ckfinder/userfiles/files/58918975442.pdf
    • http://dalieuht.com/app/webroot/uploads/files/pokeseduwewimozekiwolalu.pdf
    • https://quizai.com/uploads/files/nezadevogerogugekom.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=sex+video+calling+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b5.bin
1208de40e8bcfbabd0fbb73b87c79866354810dc0f1fbebb152f4a96c6bed56b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B5 17192 bytes
font_01_sfnt_off000114e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114E5 16792 bytes
font_02_sfnt_off00012cfc.bin
7ab8ff7c16e507981909926bbd58cd37722f0d6f0ebf5ef7ad387a66beca1d71
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFC 10660 bytes