Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ce76361a410cd2…

MALICIOUS

PDF

62.0 KB Created: 2021-02-13 22:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c5a1cb524855be0876db671142b920c8 SHA-1: 23790e85b95c1522d55380fe45dc6cb735423b67 SHA-256: 95ce76361a410cd29fc45f59164db1a5507b5974085900b7669642f8ea9b3ffe
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many of which are categorized as unknown or malicious, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external PDF links, and ClamAV detection confirms it as a phishing trojan. While no scripts were directly extracted, the nature of the embedded links points towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://jottigo.ru/123?utm_term=introduction+to+attic+greek+answer+key PDF link annotation
    • http://armada.technology/msft_earnings_report_whisperx00qy.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/Fjhjfjf/3d_sound_effects_app_for_android.pdfIn PDF document text
    • http://organize.shop/un_monstruo_viene_a_verme_libro2qot6.pdfIn PDF document text
    • https://mirijanonukuzo.weebly.com/uploads/1/3/2/7/132740352/3965087.pdfIn PDF document text
    • http://opticsystem.website/worigafoniverumuvaxefurahszoc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wigugagekubog.rf.gd/cabin_fever_1_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/lerojepoxaru.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/badmash_company_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/66508683212.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/ccpsa_cover_sheet.pdfIn PDF document text
    • http://sefatefa.epizy.com/aperture_photometry_tool_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/transtornos_falciformes_o_que.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7BB 5268 bytes
SHA-256: a325b95a20fe7409db24435bf302649a4d024d7e611ef37754f03ae638b3cc76
font_01_sfnt_off0000c9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CE 9808 bytes
SHA-256: 3ed94e5f8a7f617ba19883917c1165cfe58ff4d231071ffa673c6acf8a696abf

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