Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d01ad547a89f02…

MALICIOUS

PDF

66.5 KB Created: 2021-04-03 03:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b5184abab73233160a5551fe0443627f SHA-1: 4c3eef25cea92d47aa776e8e1bd9d93f250ba46b SHA-256: 59d01ad547a89f02bbdeb8cbaa38f5b4af24a740c5b52e6341d8d56de599ddae
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicating a link farm designed to distribute malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, potentially leveraging embedded JavaScript for exploitation.

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://kuzutuzo.ru/wix?keyword=covalent+bonding+webquest+worksheet+answers PDF link annotation
    • https://tinuwese.weebly.com/uploads/1/3/5/3/135300683/5108647.pdfIn PDF document text
    • https://ponegibafuzixi.weebly.com/uploads/1/3/1/4/131406662/jimed-kekadifepuv-rawifusafojub-gotubebob.pdfIn PDF document text
    • https://fikejibin.weebly.com/uploads/1/3/4/3/134331262/1053198.pdfIn PDF document text
    • https://kokilanoru.weebly.com/uploads/1/3/4/0/134012510/pawuwutidoj.pdfIn PDF document text
    • https://fakanodadix.weebly.com/uploads/1/3/4/3/134371587/nuwasivagojezivisi.pdfIn PDF document text
    • https://ladifibefumuxuw.weebly.com/uploads/1/3/4/3/134353250/virexunogalu.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/bogeguva/73292276346.pdfIn PDF document text
    • http://tazomibege.epizy.com/lean_muscle_diet_download.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/mupifenot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f42a90e6-5190-4102-9994-ad6f6a862c6d/how_to_file_an_aflac_vision_claim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0898ec09-48f5-4224-8333-558e0ab0891b/starbucks_drinks_without_coffee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f700c94-3a50-45d8-8614-95340f337d1b/37308331546.pdfIn PDF document text
    • http://xegewal.epizy.com/concepts_of_quality_management_in_healthcare_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/59254609255.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/run-on_sentence_worksheet.pdfIn PDF document text
    • http://mopoluganiniru.epizy.com/jurapafule.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_off0000c7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FA 5472 bytes
SHA-256: a1cd89ffe3e9ae1e653ca19805cf88ed8788626b73fbd18d3810a9b0e655f2e7
font_01_sfnt_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 9920 bytes
SHA-256: 05a9bf58fd29e91311f2247ebf9b76777130300029ea2e29ce5243d97f3a2f4d

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