Malicious PDF — malware analysis report

Static analysis result for SHA-256 70bc883092ad82b3…

MALICIOUS

PDF

60.6 KB Created: 2020-11-26 04:38:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7231930c989b84ef1e045377d1d3c1aa SHA-1: 6c3ae9fbccfb24df09ecfb6ce701fd03de93d75d SHA-256: 70bc883092ad82b3be5bd7273d992e3cbc7ca10ebd5163f6f100df4aba44e741
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a game, likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://traffnew.ru/123?utm_term=stick+figure+badminton+3+crazy+games PDF link annotation
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/lusilataviludova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450418/normal_5fb986f388c2b.pdfIn PDF document text
    • https://didunebufanef.weebly.com/uploads/1/3/4/6/134680758/707482.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/leguvefu/netgear_nighthawk_x4s_ac2600_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63e0e29-0d7a-4735-ac3a-5d17d3294184/lomekuvalibirakajekesak.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/calories_in_one_large_pork_chop_grilled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd8152a6-544a-4346-96ba-53778e18651d/paluvemanujubajemukid.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/saxon_math_pre_algebra_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479c8e09-511e-4cbe-8ec5-a0def3a83dd2/gugofufawebewe.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_off0000af18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF18 5932 bytes
SHA-256: bc037cd0618fab052e2e9ddf99548660a5a426f805e56b722f45c10470f96813
font_01_sfnt_off0000c34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34C 9824 bytes
SHA-256: 51701a963b1ddfa068b42270509f9a77417f1553350172b8c70590e3cedd6459

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