Malicious PDF — malware analysis report

Static analysis result for SHA-256 c600abb01dcfb213…

MALICIOUS

PDF

79.2 KB Created: 2021-02-28 20:33:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 21dbae402043630fa2ea53ccb2d4de24 SHA-1: e5375fa3d32dea1b62237910c0f702021c363dc6 SHA-256: c600abb01dcfb2135ddef51bad422740f24cc0aec6a7fef3a02daaa86ddf9f11
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, which is a common tactic for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm suggest it's designed to lead users to potentially harmful content or phishing pages.

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
  • 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://jumiwimov.ru/award?keyword=dysfunctional+behavior+examples PDF link annotation
    • http://vugekowuzujed.scienceontheweb.net/2001_honda_civic_transmission_rebuild_cost.pdfIn PDF document text
    • http://onenature.space/xemoborunatimowisozi7sw1b.pdfIn PDF document text
    • https://teregurejojexol.weebly.com/uploads/1/3/4/8/134879353/3240b403cdc6ab.pdfIn PDF document text
    • https://tajerupabud.weebly.com/uploads/1/3/1/1/131164315/dc17bfc.pdfIn PDF document text
    • https://sekugiwa.weebly.com/uploads/1/3/0/7/130739582/2234036.pdfIn PDF document text
    • https://dubekanenek.weebly.com/uploads/1/3/3/9/133997540/nofowozewosu.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/how_to_enter_group_code_pokemon_go.pdfIn PDF document text
    • https://toxafowusolele.weebly.com/uploads/1/3/2/8/132815148/0b6ea.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/top_25_machine_learning_startups_to_watch_in_2020.pdfIn PDF document text
    • http://creamspait.xyz/zisolujikiwotikunebur9oh.pdfIn PDF document text
    • http://ighelpcenter.xyz/buzzed_drinking_game_cards8mrdf.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/vosanubivipepuj_zetudam.pdfIn PDF document text
    • http://tb-films.ru/738961149upo9g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzanuziti.myartsonline.com/introduction_to_computation_and_programming_using_python_third_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/switzerland_visa_application_form_for_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/8783267353.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/quality_management_certification_for_nurses.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/fadafu.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/battlefield_1_soundtrack_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A1 4276 bytes
SHA-256: fcbed760a193a85bec0ad04dbb05c33054d101fe4712608fe8ce609b0460846b
font_01_sfnt_off0000f7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A9 5624 bytes
SHA-256: a2932b81b5313d25a0218c1f4bb44bf1aa5cc2ec34c8506ffee26a76de5d8aa1
font_02_sfnt_off00010ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB9 10644 bytes
SHA-256: e35e64ec6d80d3c17677284b86bbc96f583421878f93243d5c8527eacf0a250c

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