Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfe99e21a3f18e0…

MALICIOUS

PDF

77.2 KB Created: 2021-01-09 17:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9157144c17d5c25203fa8a9fd65807f3 SHA-1: 716454b3b62030d6709b6bb10e9e726957e641e6 SHA-256: ccfe99e21a3f18e015ca87b616cdb71e7261735a05a646dab65eab775af1cf34
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, traffset.ru. The document body, though heavily obfuscated, suggests a lure related to "street skating game unblocked". The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of external URIs suggests the document is intended to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=street+skating+game+unblocked PDF link annotation
    • https://cdn.sqhk.co/lojumisebu/2myxidD/pagogoneg.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvojeve/jijdxJM/lovasodegulapibesen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f8d0ffa802db.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/InejcA7/dewivobotinasopafozi.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/rhcsZkQ/smashy_road_2.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/kgcZjiE/rollercoaster_tycoon_4_mobile_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f8c43401b44a.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/XhjFl5q/wazuziwerepowok.pdfIn PDF document text
    • https://cdn.sqhk.co/dederubap/ihaoic4/void_pyramid_of_giza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451028/normal_5fa1542b04f6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5fa9087c91072.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/sitok/calculus_3_lecture_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/14965348747.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/68738834798.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/56991569538.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/84674466828.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_off0000ec17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 5568 bytes
SHA-256: 0eb2c811526aed0b20ae7e30dc7e4e7ef7a8f240982976b02fbaf5d58aef3c43
font_01_sfnt_off0000fef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF0 11492 bytes
SHA-256: 2509411b298b50833acf91ebfc1776d5c21d74510a898eedb133f654e609ced2

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