Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0369f2ed43860a6…

MALICIOUS

PDF

107.6 KB Created: 2021-03-02 01:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2e4d9fea6192037c4698c8634ddc80dc SHA-1: 21a6019f1cba59c6f35066ba4ec539169886816c SHA-256: e0369f2ed43860a6830e9f9a033dbac9bbe01b7cbaf55d97303779fbc84a812e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=mi+propio+auto+book PDF link annotation
    • https://cdn.sqhk.co/jigugabopu/b6q4iid/fubolutuzibif.pdfIn PDF document text
    • https://nomabedipami.weebly.com/uploads/1/3/1/4/131437379/dd61d85bbb.pdfIn PDF document text
    • http://mainsale.info/the_last_of_us_all_trophy_guidelau2r.pdfIn PDF document text
    • http://shoop-ft.ru/pukebinedewekevekar20gi.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/haibUgc/tauceti_vulkan_technology_benchmark_download.pdfIn PDF document text
    • http://easy-money-cash.space/guide_to_fill_citizenship_application_form7q9yn.pdfIn PDF document text
    • https://setabuzi.weebly.com/uploads/1/3/0/7/130775645/9226979.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/rogikemefedizokabebe.pdfIn PDF document text
    • https://nekamefirojes.weebly.com/uploads/1/3/0/7/130739169/birafuxuneboki_derejesidosetav.pdfIn PDF document text
    • https://labivorimafixal.weebly.com/uploads/1/3/4/8/134886738/3a8cc6bd5390fd.pdfIn PDF document text
    • https://zokibiruxe.weebly.com/uploads/1/3/5/3/135326092/4999745.pdfIn PDF document text
    • http://ogranicbio.space/kenmore_500_dryer_not_spinningrcrmk.pdfIn PDF document text
    • https://xurajozut.weebly.com/uploads/1/3/4/3/134371968/dasoriteve_dudebaxij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • 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_off000157e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157E8 4812 bytes
SHA-256: 74e38f350c04de4116dce72f5804a3571060a511db25ef6f013ac61ddbee476c
font_01_sfnt_off00016857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16857 10476 bytes
SHA-256: 3cf849e2b18b9c888140b90ce2e8874c416c657da4aba57e050aa5af22ec42b2
font_02_sfnt_off00018c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C6B 16084 bytes
SHA-256: 12e1bdea5fc73f205daff8bbc4573b4c6e5ba94205cf5b3440f65e61b625f0f0

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