Malicious PDF — malware analysis report

Static analysis result for SHA-256 81540148f4a2e0ca…

MALICIOUS

PDF

67.6 KB Created: 2020-12-25 00:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 846aff6656e847c28054df04d26566ab SHA-1: c376feed697295bd23c4d7b85334936b9bc03893 SHA-256: 81540148f4a2e0ca5293ff714299bcfee9f283828d46b9f60f6a49f290e78a26
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL `https://trafftec.ru/strik?utm_term=extreme+driving+simulator+bugatti+locations` suggests a phishing attempt, likely aiming to trick the user into visiting a malicious site. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=extreme+driving+simulator+bugatti+locations PDF link annotation
    • https://cdn.sqhk.co/fidapulano/ShyhflU/snowflake_ipo_date_2020_price.pdfIn PDF document text
    • https://cdn.sqhk.co/bidubuwawi/VyZjgVD/pogromcy_duchow_playmobil.pdfIn PDF document text
    • https://cdn.sqhk.co/jesuzedavoti/dgiZigg/morgz_pause_challenge_meme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tanikanaw/barren_river_lake_bass_fishing_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9322d3a5-195f-4c55-b755-96b6012a1ec8/39321974202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7c896b-cd25-47ba-991a-db3362241b8c/motawojunutakenawibes.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/vuzinolamirinuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51932b38-be26-4fd7-9ff3-f550f8657122/fufajuxujupujejepipe.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/40215002459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0c776c3-c00f-4ca5-ad8b-0491ceb954f3/sur_le_chemin_de_lcole_chanson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96470f18-8254-4a2c-bb66-219158c5e883/42698105030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85c1aa3-c68d-4086-88ba-dce2743c153c/gangster_life_unblocked.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_off0000be80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE80 5368 bytes
SHA-256: c91345db158c96441b1145dc81913b8215445250023d3c8be1b40ef555eb109e
font_01_sfnt_off0000d0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AB 10128 bytes
SHA-256: a612d83d53d76c3eeb0a057e23ac6fcd087e49f286fc237bfeb1ec1581a07277
font_02_sfnt_off0000f357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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