Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44fdeb4a67266b9…

MALICIOUS

PDF

92.7 KB Created: 2021-03-03 11:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3075ce56494bd5dc877eaa4a84bd65cc SHA-1: 20a606cf9fa49cfceacba7e48bc60c367e5cfad1 SHA-256: a44fdeb4a67266b9ec11286e2f837f47eb85791a86910dfaee91570012d817a8
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with several pointing to disposable hosting and acting as a link farm, a common tactic for phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://dugedepap.ru/123?utm_term=what+rhymes+with+moonshine PDF link annotation
    • http://sevezor.scienceontheweb.net/remington_700_bdl_30_06_synthetic_stock_for_sale.pdfIn PDF document text
    • https://kofudisefases.weebly.com/uploads/1/3/4/0/134018526/58cbd944b112b3.pdfIn PDF document text
    • http://winnerslm.space/4577998228638sw7.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/how_to_draft_and_interpret_insurance_policies.pdfIn PDF document text
    • https://gonadasefu.weebly.com/uploads/1/3/5/3/135345348/zawixinumogazaguje.pdfIn PDF document text
    • http://yogist.fun/773783102600mrhj.pdfIn PDF document text
    • http://wejnpowk.space/forozafoponozaxeniwuwze.pdfIn PDF document text
    • http://startovaya.ru/wazegajutalcpxvv.pdfIn PDF document text
    • https://ziziwatir.weebly.com/uploads/1/3/4/7/134713039/a7d294b5a88.pdfIn PDF document text
    • http://sebokuxaxugu.iblogger.org/51123412260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482009/normal_6036f7086ff9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_6019a57c5a130.pdfIn PDF document text
    • https://lukuxafibufogi.weebly.com/uploads/1/3/5/4/135400428/35f9c77a29e.pdfIn PDF document text
    • https://vozidetuvotivex.weebly.com/uploads/1/3/6/0/136094215/felofa.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/grievance_policy_template_acas8xrnm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481515/normal_5fc95d1c133ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_6031db940c096.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mobopufo.rf.gd/multiplication_times_table_worksheets_0-_12.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/why_is_my_elitebook_not_charging.pdfIn 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_off000113a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A1 5100 bytes
SHA-256: 570d3dad314a1b36ed526aa3376d2614fd100935baba69e80ae595635c4d5583
font_01_sfnt_off000124e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E5 12456 bytes
SHA-256: d6596e6b90494152bf4eb3e2366fafc393925a7268180bf806de8789d05b4249
font_02_sfnt_off00014e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E93 16652 bytes
SHA-256: f621a650ce5612d7d34ad4a305dc081f92462961aba061ec77ea3a57534fcaa4

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