Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c07e4fdfdd3f34a…

MALICIOUS

PDF

85.3 KB Created: 2021-07-05 19:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 038764e46549c682058755cfa259ce81 SHA-1: 2b7ed51fbaf8aeffe8f2fd9d81466ff2e569d367 SHA-256: 1c07e4fdfdd3f34a121a8ed33e30996231f1cf5060ff11c3e9f396343c2dc354
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, designed to redirect users to other potentially harmful sites. The presence of multiple external URI heuristics and link farm indicators supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/a2c4a68ea54bef81214f52abf1812b1b/99583113318.pdf In PDF document text
    • https://briljant-maleri.se/UserFiles/files/lovirelugunenozewin.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/numafiwob.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdfe07199a---rilewori.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/65779709070.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/38230911767.pdfIn PDF document text
    • https://mollis.rs//files/tuterug.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/3286014599.pdfIn PDF document text
    • http://imi.vc/upload/files/41801715802.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce098b74d1---senarukafaxiwu.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/mpohvhfkfjinvpr2q105gsfr23/wuvizem.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/31876d0ad74b3ae71a6288d12f0c8383/jepam.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072499552d41---xigorepekedo.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/0527a871333972720df6a7019a276a38/22987315707.pdfIn PDF document text
    • https://ijpdua.com/contents//files/81777648155.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/44538958345.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/uos2ulj2mio9uq4gq1d01fbjfb/62434756733.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/xeterif.pdfIn PDF document text
    • https://hirurgija.me//files/90773249622.pdfIn PDF document text
    • https://noddy.nu/images/file/fedepugumuwafitakafejo.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/6433c38afdb0f8908abd34345e1892b3/30637830518.pdfIn PDF document text
    • http://kbchina.de/upload/99141692933.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/dofuwekevokoti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=anatomy+of+the+constitution+icivics+worksheet+answer+keyPDF 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://www.history.com/topics/black-history/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_off0000e745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE745 17096 bytes
SHA-256: e8d450464367c9e1e1fa69da021acaca84cc216a121e9a6015d5d4583e113832
font_01_sfnt_off000113ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C03 10996 bytes
SHA-256: 03191ede5fe94e23b7764dae1c0619318329d76e3b49e7089f05d4eddbce987d

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