Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96dbd8fea3fe549…

MALICIOUS

PDF

74.2 KB Created: 2020-11-24 02:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e351dee1dc0cd738fc3b766bbd6ecaa6 SHA-1: ba1fc707a7d6c4a84e97ecd4e79a2ab29b25690a SHA-256: d96dbd8fea3fe5492a40ae2b8e625258743b3db32675a821c96ab6c403a953ba
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document that contains a large number of embedded links, many of which point to external resources. Critical heuristics indicate that the PDF contains a malicious redirector link and is part of a link farm, suggesting a phishing or SEO abuse campaign. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure strongly suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

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://cctraff.ru/strik?utm_term=rough+guide+mozambique In PDF document text
    • https://dojufewuwi.weebly.com/uploads/1/3/4/2/134235401/fixonivorujumaf-tugiko-lejiza.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/xorabadafawila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_5f9ea0c7ed8ae.pdfIn PDF document text
    • https://fegoparowewara.weebly.com/uploads/1/3/4/3/134321013/fumafixe_gofag_delakitugopeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393772/normal_5f918e749dbcd.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/fubazewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450434/normal_5fa1fb35eba48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5f8f5d524a9c1.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/gixirojozogufux/vovuvusaromadubo.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/konversi_bilangan_biner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee54eb58-a7b5-47cf-8c74-6271bb75e836/90053470708.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/c_band_satellite_channels_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/american_medical_transportation_services.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/santa_biblia_1960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ad4e50-d896-4f85-ace3-9647c28cca77/fiwibuzowepifojunovinebuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 4952 bytes
SHA-256: f7c743ecdd153bcbd4394f77a51d98e06db969b1db85d504a02b1be2fa1923d8
font_01_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 11076 bytes
SHA-256: 5e45cf341de1c01bd284786a5ed12da4571b35a56601692976b303dfbc56e15a
font_02_sfnt_off00010dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCF 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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