Malicious PDF — malware analysis report

Static analysis result for SHA-256 10687995b89018cf…

MALICIOUS

PDF

66.0 KB Created: 2020-12-26 21:25:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0e06359c6589d52a2055935e76a0e8cb SHA-1: eeb3cd8356cf273fb49faf6dc2d22e29d520fca7 SHA-256: 10687995b89018cfd15d466cbb33097d0f9950a8c21f6b3c0702a054172aaf18
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=robot+shark+2+apk+hile PDF link annotation
    • https://worubagazew.weebly.com/uploads/1/3/4/6/134639575/3fd6aca6b203a55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_5fb25c8a4262d.pdfIn PDF document text
    • https://nevonanopovew.weebly.com/uploads/1/3/4/3/134335048/xusimajagaxewatapi.pdfIn PDF document text
    • https://mujunoba.weebly.com/uploads/1/3/2/6/132682006/jumetojapiludare.pdfIn PDF document text
    • https://penusifobituje.weebly.com/uploads/1/3/4/3/134314418/5994404.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd4e9f9-34c3-4d94-b944-bbc629c400dd/how_to_get_paper_in_minecraft_ps3.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/make_ashamed_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/michael_bolton_soul_provider_album_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/xujelekom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf23e11f-b8a3-472a-bd94-461b77e7e032/wivopifalawuvun.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/holes_camp_green_lake_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/jamaxavu.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_off0000c640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC640 5248 bytes
SHA-256: cbf624a3c5cf6167ac8bea1d09d384b0b94e161eb2656f0df05d0cbaff66a636
font_01_sfnt_off0000d80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80F 10060 bytes
SHA-256: ca01730c91462b2d10708136be5251915685151442e31dae43ad84be43a5238e