Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e439b875dc8be17…

MALICIOUS

PDF

74.6 KB Created: 2020-11-25 15:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e794533a5dea553d7a4e65f7571c4e99 SHA-1: 73335125ea2137d00292c39774c72df33c3a724d SHA-256: 2e439b875dc8be17b293c38d4ff4986d7476c3fe3af736aec01aba8a8ff1622a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic indicating a mass external PDF link farm, with one prominent URL pointing to 'traffking.ru'. The document body, though heavily obfuscated, contains text related to watching movies online, suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely for phishing or malware delivery.

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://traffking.ru/123?utm_term=watch+the+last+dragon+free+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5fa63f857085c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f873c2471567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f8b5bda3780a.pdfIn PDF document text
    • https://kojelokawuzu.weebly.com/uploads/1/3/4/3/134341929/juwividakex-sitagomiwi.pdfIn PDF document text
    • https://degepuwenezeg.weebly.com/uploads/1/3/1/6/131607310/gukaren.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5fbb1c446417b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405181/normal_5fa7450c417b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483335/normal_5fb8ba748edef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_5f94fc9a51cf6.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/rijaliwiguvex/funijamafogex.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/kentucky_dcbs_online_reporting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9dc49bd-1d16-44e8-9854-9da20c7ffe26/pokemon_revolution_online_download_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/bpsc_admit_card_2019_direct_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2546f209-7a5f-4be3-9ee1-a17c90591808/puxejoderajukuduropabebil.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/bill_nye_periodic_table_worksheet.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_off0000e67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67C 5296 bytes
SHA-256: 619beb08cceabef127d1fc7b47bb5c40ecfcf2bc6fd249dd62b1366bc459e0fc
font_01_sfnt_off0000f889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF889 11072 bytes
SHA-256: 8b3da5b6d91e96d5761c92f0ab4ed0bf2fda023e385553ff5125523610afefcb

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