Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a6cc2389e29476…

MALICIOUS

PDF

77.3 KB Created: 2021-03-24 12:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c7da67a53aba282cba6ed14bc94c58e7 SHA-1: cacf87b862488b5324531cee7b0c8c50c60c5af4 SHA-256: 25a6cc2389e29476cd126e9c5945c6e3a7d3910947bd84b356be74619fa40c4b
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to the title 'What happens to blood when you die', likely intended to trick users into clicking the malicious link.

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://crophysi.ru/strik?utm_term=what+happens+to+blood+when+you+die In PDF document text
    • http://luzupogakij.sportsontheweb.net/value_added_tax_philippines.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/robexebavufabak.pdfIn PDF document text
    • http://budonap.iblogger.org/refrigeration_and_air_conditioning_nptel_notes.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/metal_gear_solid_5_modst7zq1.pdfIn PDF document text
    • http://basagutidabe.sportsontheweb.net/35567178027.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/56102358087.pdfIn PDF document text
    • http://gorapesebo.iblogger.org/sijonifazox.pdfIn PDF document text
    • http://obmenkalnr.online/kagakijagmb67.pdfIn PDF document text
    • http://optalpha.com/vaxukitosivurumevitidevig7ge0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d38100-790e-4e80-9245-d441f31c8e12/zufejadet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4dd7bf-ba92-4db7-8625-c961d78c4557/12004870470.pdfIn PDF document text
    • http://sulorowanutabu.atwebpages.com/xawefobo.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/large_sheet_of_paper_crossword_puzzle_clue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b81326-d0fe-40af-bf63-d19af82f3a47/kenijugebagajezewinajugis.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/rabimudorefovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c70617-7269-47c1-be9a-47f1d8113a13/53593435309.pdfIn PDF document text
    • http://pulilubanis.rf.gd/lagu_betrayer_bendera_kuning_new_version.pdfIn PDF document text
    • http://wobadumiravolu.atwebpages.com/samsung_galaxy_a10e_philippines_price.pdfIn PDF document text
    • http://zazaluvuzusu.rf.gd/i_cant_make_this_up_meme.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_off0000f2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B2 5296 bytes
SHA-256: 44f174bb347dade4be7fe64bfdaa2064bfd5c1dd5c6c6b0f1bf9735f4320ca98
font_01_sfnt_off000104ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 10376 bytes
SHA-256: 41493e27832cf893b0ac498cef41a964d4f31059c596a8e8168f54a5daf766f2

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