Malicious PDF — malware analysis report

Static analysis result for SHA-256 046d2cc5f254b369…

MALICIOUS

PDF

69.9 KB Created: 2021-05-22 01:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 8f5cdf0fa67c00087c831fb7b8cc17b6 SHA-1: 7a5db14095443f81726bd19250de5fe4b14a5693 SHA-256: 046d2cc5f254b3690a6e2f6944d84f9bbce5e879362ce6aeba78732214892332
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm intended to direct users to other PDFs. One prominent URL, 'https://lozipotod.ru/wb?keyword=phrasal%20verb%20quiz%20esl', suggests a lure for educational content, masking a malicious intent. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wb?keyword=phrasal%20verb%20quiz%20esl PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382784/normal_6009a1749f716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452392/normal_5fd3aa1150c77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_5fe76874f305a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404490/normal_5fd132f405c07.pdfIn PDF document text
    • https://jivetigaforivuj.weebly.com/uploads/1/3/4/3/134350389/fujiwetijelon-soxalixetuxeg-wowewalaxikajuk.pdfIn PDF document text
    • https://zoforofutesabuw.weebly.com/uploads/1/3/4/7/134751738/dimadawiwixoduwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404727/normal_5ffd03f54f83c.pdfIn PDF document text
    • https://nadenekaf.weebly.com/uploads/1/3/0/7/130739264/3441449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_602d3c94692e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411489/normal_5fcf5b8964559.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/fewunadupop/vokatitujufasifupukulew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d64daa4-29b8-497b-9e7d-66697a5f4c7c/cant_stop_wont_stop_lyrics_rhcp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f6c72df-507b-4e1c-9329-0df0617e7ae4/3564325395.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/borbaad_full_movie_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/honeywell_hz_709_recall.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/vufurewafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca9b075-88eb-4304-888a-788bbb45159b/24160865854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1ff76f-55c7-431d-8de3-cbe6508c2f9d/majestic_gas_fireplace_insert_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/tolofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c0ff52-571a-4395-9283-53c850759468/dekopemuw.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_off0000d282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD282 5148 bytes
SHA-256: 176a8574d07f14e93592c1b84a66dd82da25060ebe0d81f42f61f815bda9a18d
font_01_sfnt_off0000e40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40A 11124 bytes
SHA-256: cd11f9d218ea59a67769d3d821c6ac1b38dd5b7c156ab5c671d4b3c78094ff54

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