Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f0de7eb050f648…

MALICIOUS

PDF

71.2 KB Created: 2020-12-13 14:13:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a6139ed858bc5da491a7e7a2d30454e5 SHA-1: 9b5dbb885632272a742d73284bd4543623cd09ec SHA-256: 77f0de7eb050f6483a1024913a986879a1852184faaee31462717dd1b253d1c3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary suspicious URL pointing to 'traffnew.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution, with the embedded URLs serving as the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/strik?utm_term=jeppesen+approach+plate+symbology PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f8bd624b8a93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_5faa492d1e696.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/8163953.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374852/normal_5fd0436744a30.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/7778316.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/neviwove/bodagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3ab465-12b3-4f62-ad9e-d832b2e51d07/jegobuwexujavu.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/wool_dryer_balls_vs_dryer_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/84754847808.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/mccoy_cookie_jars_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21c30a162e0c52977d/t/5fc15afceaf37e3b64ceca72/1606507261571/15983020662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af0efc3-f274-4a7c-83ef-dd593d6176d1/kshow_road_to_kingdom.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/27721960428.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 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA41 5320 bytes
SHA-256: b0f3480ae998c84caba7fa4d5866a6c3b449afac7ab89df2646bbfeab7789913
font_01_sfnt_off0000dc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 10988 bytes
SHA-256: 0e6df4ab79fabb0a467ea01b4b28aae31ed8a57950dd45398fd991611f3f6179
font_02_sfnt_off0001018c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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