Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41e29578053d395…

MALICIOUS

PDF

68.5 KB Created: 2020-12-23 14:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d880c3ffe423f5383135db9103ade80b SHA-1: 2cd5c321ed8ab331bb8ac656d0f8fd7a77cc5310 SHA-256: e41e29578053d3955c901e71a20c19b120201c06211e911ed933188a0e687004
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ML classifier and ClamAV, and contains an embedded URL pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to academic templates, which is a common phishing tactic. The presence of an external URI indicates an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=latex+template+for+class+notes PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7132e4f6-eabb-42b6-aa93-41d6de9d16d2/delepagef.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/50392629591.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/zuxuzovujufiguvuwiwozigu.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/tirumuz.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/overture_to_candide_band.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/fajuresufutupi.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/dexeweribesoxanolu.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/47599550543.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/82788091052.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/blade_runner_2049_torrents.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/8958670266.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/4834688449.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/luvuwetirozadovadiz.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_off0000b9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C4 5332 bytes
SHA-256: 70e7145c8f696db77a9915ac60cb18814b4a459920cfb4865d2036fdce9d3326
font_01_sfnt_off0000cc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC26 5168 bytes
SHA-256: c07aac9a1f006a2b0b8e65b8797205ae2b089c8143bed628891976b2aa7e1d36
font_02_sfnt_off0000ddb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB2 11900 bytes
SHA-256: 88bcb6c791fe9b852c4ad65191eee940c7a3114f6774c2e2d69942d3b62788e1