Malicious PDF — malware analysis report

Static analysis result for SHA-256 695f15419dc4f41d…

MALICIOUS

PDF

90.7 KB Created: 2021-03-06 11:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bab920b8b6b5877ad438853ff0d0e5a7 SHA-1: 5bcf6cd975252494d802cdd304dd10fc0a1a8cdc SHA-256: 695f15419dc4f41de26e35b7e11180c1320618baf97c74b5e0ba929b49f1a424
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest an attempt to direct users to malicious sites.

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
  • 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://crophysi.ru/strik?utm_term=beats+by+dre+release+date In PDF document text
    • http://vepekideku.iblogger.org/matlab_for_loop_character_array.pdfIn PDF document text
    • https://zogewuvenofo.weebly.com/uploads/1/3/2/6/132683334/5247772.pdfIn PDF document text
    • https://visegonikagade.weebly.com/uploads/1/3/4/6/134626066/981ca82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447467/normal_60301c56211b2.pdfIn PDF document text
    • http://nadipasigisapup.22web.org/que_es_destilacion_por_arrastre_de_vapor_en_quimica.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366341/normal_5feb6cd7aa2d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472491/normal_602f7c43ec223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406229/normal_5fdbae366b2db.pdfIn PDF document text
    • https://tepukijamuboze.weebly.com/uploads/1/3/5/3/135301813/jexufesezelina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487888/normal_5fccc3a479a15.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/53987861891.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482638/normal_5fcba3f9b62d8.pdfIn PDF document text
    • https://jarufepijup.weebly.com/uploads/1/3/0/7/130776730/sagupiloful_tajawiz.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/1698661.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/gekixadonuru/casio_triple_sensor_solar_powered_protrek.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/46915719803.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/physical_appearance_adjectives.pdfIn PDF document text
    • http://tixujuw.rf.gd/7569558003.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/tibumimuzudetogigifuvu.pdfIn PDF document text
    • http://fidalanono.myartsonline.com/tudimas.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/bivizixoku.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_off00012579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12579 5108 bytes
SHA-256: 7f462c4532fe307737b120f92f3f6f62f67d13dc53b8d23787390a8bdcb1383a
font_01_sfnt_off000136e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E8 11280 bytes
SHA-256: 13af9024c030643637f38bcd15b16cc5772e23881aeb9919658b327131d7a3bf

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