Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e76f7641a343e7…

MALICIOUS

PDF

81.4 KB Created: 2021-08-20 07:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: cd94e2a0bd4e78fad163ef04fc9e440c SHA-1: 213e094bf936464359651954182b403fa673ed80 SHA-256: 29e76f7641a343e7413ca4a1595a27842fd546b850fa13938cfd84641cad81a6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded JavaScript and extensive link farm pointing to disposable hosting suggest an attempt to redirect users to malicious sites for phishing or further malware delivery. The PDF structure and link farm indicate a common pattern for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://carshopm.com/js/upload/files/5202664660.pdf In PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/tubobipemivujukik.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/8aec811b764f62c70bf6f4f98fe6cee3/18667845433.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/xejudepowagaboseber.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1622362104.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/99452695214.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/nufuruse.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086d1d515a68---sodibigipadamugonadi.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/nk2hv64upngllgn0ggplujl94i/fipokozasa.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df48d255f8d---supopasipigo.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/ac3df31079ad22c28a1d07e50f3dff01/lidupadexapexaridoto.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/94048205487.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/21011793793.pdfIn PDF document text
    • http://taitung-house.com/CKEdit/upload/files/9252116567.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/d3cd5440326d9a702ce38950cc34fe5c/zowoziwevoxebimijeti.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/wedudazoxepeba.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/d2c8e4551228e81872d825688edf95b4/82067160175.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/funowizatemarivufuwidugej.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/zujurofokun.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/numasiwovome.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f798cb7a20---59583967332.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/252558ae1bf73c4f3d6aeffd6578ca4c/32299233543.pdfIn PDF document text
    • http://agavietnam.com/img/files/31455321238.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/76181807104.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=laurens+county+ga+criminal+recordsPDF 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_off0000d92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92C 16976 bytes
SHA-256: 476f246c5b53ccfd8693aa5c75dce005943179a0b507e0764e02a1bdc0f1c2e8
font_01_sfnt_off000105b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCA 10884 bytes
SHA-256: 75fce87393bce06eac0066907ac0cbf1aedc07fb8e88782a2ad85a301e1ba5d8