Malicious PDF — malware analysis report

Static analysis result for SHA-256 0646135d1899de8c…

MALICIOUS

PDF

75.6 KB Created: 2021-05-27 16:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d593fff5fb5903769e416d34b0f075b5 SHA-1: e21240423b27b34dc7df18f2fb40d457ebb19fc3 SHA-256: 0646135d1899de8caf74c6689a604ce269cc75c02b2dea36e9b8b95f7b8fb434
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though partially corrupted, indicates a lure related to retrieving personal information, consistent with phishing or credential harvesting campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/98kr6tepu4jd4u29b03cus9qae/fevanewivukefiba.pdf In PDF document text
    • http://didocrosby.com/imagenes/file/gurusos.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/9it0546hbaur8d6s26l0ts6n69/66745280188.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16073d54ada2e2---tabokerakap.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/tixenejuvolapenedunum.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7997a930d---46347840118.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/urspcbtbq78fpuud0748u875gt/bezizotapenima.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/gufoxujuruvowo.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/78a538640a8596220e1f2f1e7a7fc320/80865961506.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/64924400162.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/vimusujovem.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/9tv59uq2qlffo4irh8gfc94tp1/vapadoniputujomut.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/ladikipepimamaxoxane.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/021353437834.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a18203d190---80004559107.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800d76dd98e---pesizaxefe.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/gofobujopavoxidodiwomumi.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0ddaa8dd1---tivebegefarivalimin.pdfIn PDF document text
    • http://alphaconsultinggroup.us/vpw/images/file/7381070548.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/9d76d5d26cd43c7b1038a391d08771b4/48609983344.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+retrieve+my+nimc+number+onlinePDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1E 4912 bytes
SHA-256: fca0e851b0a8eb369b8bd5e78b261e756d055c3162c35fb9dc0fb41c96be65ee
font_01_sfnt_off0000fadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADB 11288 bytes
SHA-256: c7ec3f9a683a6a21b9decafce84bcfac2aba6284117454ad7648a0b199a6b717

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