Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e4dc971f9862fb…

MALICIOUS

PDF

73.3 KB Created: 2021-02-25 17:56:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 834497f380332dd90fdc7789585bba88 SHA-1: 7b7682504ebc133b84100189614e2e3a22341301 SHA-256: 70e4dc971f9862fbea153c69b54c81aaf27334755dfdcf689791914467653a3d
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to ebook downloads, suggesting a phishing or scam attempt.

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
  • 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://crophysi.ru/strik?utm_term=the+penguin+anthology+of+twentieth-century+american+poetry+ebook In PDF document text
    • https://cdn.sqhk.co/livatunozasu/aVFiaia/gizavufajogexe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477910/normal_5fcb7b70b59b7.pdfIn PDF document text
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/9fb40b1.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/bereja.pdfIn PDF document text
    • https://jodexozemusokut.weebly.com/uploads/1/3/3/9/133999246/2668828.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimitafukufes.rf.gd/detobulamav.pdfIn PDF document text
    • http://kogivekadavan.rf.gd/14863114002.pdfIn PDF document text
    • http://savekuf.rf.gd/bid_wars_mod_apk_2._19.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/57185366871.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/mibivinikuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/caida_de_cordon_umbilical.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_off0000e00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 5632 bytes
SHA-256: f5366f6f6a604a68a4ae4b14f0d1884bbac7b8855cd39f517290249ee4a21e97
font_01_sfnt_off0000f335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF335 10740 bytes
SHA-256: bb9bff5d3546f9a7d1d47fc4719090e409f7045b5a75d39478c505c454a050d3

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