Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfe0353f80abdbd…

MALICIOUS

PDF

77.6 KB Created: 2021-01-05 15:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8547da01c18ffc1c4039ba4faef4e224 SHA-1: 7dd8ab22b9ec8db33dd663464ab60f55a9c50be6 SHA-256: 5bfe0353f80abdbdef2d6d95d8147334c1dd3b21422ac0153298ccf5381a599e
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with critical heuristics identifying it as a malicious redirector link and a PDF link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Paper mario world 2' and application metadata, suggesting a lure to potentially malicious content hosted on the identified URLs.

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 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.
  • 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://traffking.ru/123?utm_term=paper+mario+world+2 In PDF document text
    • https://julovupepopa.weebly.com/uploads/1/3/4/5/134522834/467722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f8fed32babf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_5fd68aa64ee4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5fd2ffa346981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_5fbff63d7cc2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5fd048bd4c4ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5fd1361a458a0.pdfIn PDF document text
    • https://tufiganifipira.weebly.com/uploads/1/3/4/3/134310976/ziminosijuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_5fbce6e3db3d3.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/memul/egg_cup_drill_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/ohio_affidavit_of_domicile_form.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/apex_racing_league.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cb8bc92-da43-4264-a218-5b72d4775da0/safeip_crackeado_2017.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_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 5152 bytes
SHA-256: ce1ed74db0f254bca17d35aaf6f390e6c9a9c4d9afd5da3f007743d5c2f16aa8
font_01_sfnt_off00010560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10560 10660 bytes
SHA-256: 419e71961bcc55d83c4157b9bbe8169300ae9cab474a0bfa634fa4e77e0c6ac4

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