Malicious PDF — malware analysis report

Static analysis result for SHA-256 931c8726e2f7c208…

MALICIOUS

PDF

79.2 KB Created: 2021-02-16 21:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7c56f9ccc4e9776ca38d0bc13570a2a9 SHA-1: 16e352881930ba563eeda553b674561f5d09bdcc SHA-256: 931c8726e2f7c208377954bd5e09c88a11a8a2134e80e877dff290dac814618a
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or redirector. The embedded link directs to known malicious infrastructure, indicating an attempt to lead the user to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=what+is+fob+in+freight In PDF document text
    • https://cdn.sqhk.co/moxinivo/gfjcifc/candied_ice_cream_parlour.pdfIn PDF document text
    • https://muwirejevom.weebly.com/uploads/1/3/1/8/131857435/sekusovezozelip.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/chdqoNF/spirit_of_faith_family_church_iowa.pdfIn PDF document text
    • https://xozipirun.weebly.com/uploads/1/3/5/3/135324749/0c5d665b741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_601d32277ab12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368777/normal_5fc6a6b09e49b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387709/normal_5ff82c97c4307.pdfIn PDF document text
    • http://basiditdcf.space/luziwuvapiwe7amty.pdfIn PDF document text
    • https://nazoturifebigik.weebly.com/uploads/1/3/1/6/131606271/vuramajov_kepilojapepam.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/hHjcCX3/knife_sharpener_in_spanish_translation.pdfIn PDF document text
    • http://vidclips.design/jawubaf2miw.pdfIn PDF document text
    • http://afracheat2.xyz/amadeus_manuelgi9ej.pdfIn PDF document text
    • http://chebsvet.ru/h_para_hombresoit4d.pdfIn PDF document text
    • https://cdn.sqhk.co/wafexumu/jdiibtq/exorbitant_in_a_sentence.pdfIn PDF document text
    • https://zifofuxe.weebly.com/uploads/1/3/5/3/135386801/wukosilizuwen_labexegawuzox.pdfIn PDF document text
    • https://vimuxinifol.weebly.com/uploads/1/3/5/3/135348687/pubel_maperijitav_bugosepukom.pdfIn PDF document text
    • http://girlsbeach.space/best_jump_scares_on_youtubewwqal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_601bcfa944f43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/bugaboo_frog_assembly_manual.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 5148 bytes
SHA-256: e7e74e292c2bad3b32f6b5c5f908a400c356deecc76531978d590b2c073a3cc3
font_01_sfnt_off000108d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D8 11304 bytes
SHA-256: e592b38d70e1d76427a1c386969ff4eab66af3c4f75911c166c0caebd9463a37

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