Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e69a21d85291a4a…

MALICIOUS

PDF

72.8 KB Created: 2020-11-09 20:01:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 785dcc08bf2431f058aa12c0e2df5208 SHA-1: 039a1b84b89e979a01ef67174ef85d91c6c939f0 SHA-256: 7e69a21d85291a4a6fe2f51710e0f355d37a0e2e6c189605cadde9a16e929a65
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, including a link farm designed to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of a link farm and embedded JavaScript points towards an attempt to host and distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/aws?keyword=trials+of+heroes+pc PDF link annotation
    • https://dexidexida.weebly.com/uploads/1/3/4/2/134235246/zurezexepufapovemuge.pdfIn PDF document text
    • https://nupejaxisolerez.weebly.com/uploads/1/3/4/3/134348845/duzupalelezi_xolodagaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_5fa1ae7472286.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/zuzifokotinaw.pdfIn PDF document text
    • https://vapufubewadul.weebly.com/uploads/1/3/4/4/134485241/3996676.pdfIn PDF document text
    • https://sapakokejepudig.weebly.com/uploads/1/3/4/4/134457578/fawilebexanakuw.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/ladojenefe/positive_behavior_support_plan_for_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/295b4439-3a5f-4245-9969-898aeb85d2f0/libros_de_ingles_nivel_basico.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/new_google_sites_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/47038063553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eab20ff-6558-4940-95d2-fbcf3790e527/74816596594.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/51123394053.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/keystone_species_in_tundra_biome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aa9a344-d245-4578-bb58-5eb433ff3fa6/xaxeposorinod.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_off0000d62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62D 5052 bytes
SHA-256: 75d51c9bd5a7f91b7b770ca8fe9d2c7e7f18021b90a32c5411df7e1eb3da827c
font_01_sfnt_off0000e74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74D 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 10800 bytes
SHA-256: 010f3a28b73c22cf8787d0b3b6119133670293cdc5ecf0902301781d56eab2bc

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