Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a9510fd61616e7…

MALICIOUS

PDF

113.5 KB Created: 2020-11-11 03:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a467dd7ce9b1b0cb9487cb2d802e79f5 SHA-1: 1cb9f1d65e2b1d9b1255b028069f9c785dc21c52 SHA-256: 77a9510fd61616e726a07adc442b9222fb0f78bcd5917c168e11e1b9ccd70f13
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafffe.ru', which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, contains keywords related to Minecraft, suggesting a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/aws?keyword=minecraft+house+command+block+114
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.pdf
    • https://lufiwusogak.weebly.com/uploads/1/3/4/3/134319395/mitebedivivide_feruzekefojub_nubokixoti.pdf
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5fa07dbe3990f.pdf
    • https://gurogujanesoxub.weebly.com/uploads/1/3/4/5/134506981/d30c4e6.pdf
    • https://vonegulozezuxe.weebly.com/uploads/1/3/4/3/134371031/331865.pdf
    • https://pitisugokusibim.weebly.com/uploads/1/3/4/4/134445344/tarusasagixomeg_dopogu_wejonexudixibu_xagimamimojilox.pdf
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/7857710.pdf
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/9961a82d71f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5850c487-4753-4812-a752-2b7ae170fbfd/69277963977.pdf
    • https://uploads.strikinglycdn.com/files/2c4b417f-492d-4753-ae9f-ea04e5df9ddc/56675476232.pdf
    • https://s3.amazonaws.com/tesodagiwor/ziwazukarikuv.pdf
    • https://uploads.strikinglycdn.com/files/87ed392a-50b3-4aab-a04e-9aeae31d8fe4/fopelikafej.pdf
    • https://uploads.strikinglycdn.com/files/0fdd8db1-0079-43a7-98af-cba97596dd0c/91460338355.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001727f.bin
67d2157d4f86ea6439db37db21b2c711f907de28628c8b197c4b0db8621511b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1727F 2976 bytes
font_01_sfnt_off00017d24.bin
c20bd816ef3ee03e1e01dcb761987b2901c3b006b95fbcde2a0afe81b520ec20
pdf-font-stream PDF embedded font (sfnt) at offset 0x17D24 5608 bytes
font_02_sfnt_off00019021.bin
bb3fc7aa69bb1597c5a49af338ec84ac5eeff48826d7a8611f178a33aa60009f
pdf-font-stream PDF embedded font (sfnt) at offset 0x19021 12460 bytes