Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec54e1df1a3c542…

MALICIOUS

PDF

70.3 KB Created: 2020-12-22 14:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a5134159522bf567344208d6e9f9cf40 SHA-1: bb99b559bdba5ff76353e173ca2c31a7822205b1 SHA-256: eec54e1df1a3c542806b77bb3f305772b02aad0040d283500ce8f6da0c24a09c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'trafftec.ru', which is likely part of a phishing or credential harvesting scheme. The document body, though heavily obfuscated, suggests a lure related to 'corten steel sheet suppliers uk'. No scripts were extracted, but the presence of an external URI and the phishing classification indicate a likely attempt to redirect users 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://trafftec.ru/aws?utm_term=corten+steel+sheet+suppliers+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501204/normal_5faf00069ffd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370055/normal_5fc3ba2db4d74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457279/normal_5fa16a98879c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5f9419c6e757f.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/nerugiraxura/bosch_coolant_temperature_sensor_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb4ab62-82fa-4940-bcfa-01513b4e10c1/58141331125.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/magistrate_court_cost.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc582dfc30a162e0c71c6b6/t/5fcaf32511c29807e6cfef27/1607136038199/29980516077.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/23776077398.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/auditing_notes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc593df27a199023ad5232a/t/5fd13141d0513819add6b522/1607545153765/barbecue_ribs_in_oven_dry_rub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4b9e1cd-8e87-4afb-adba-7f120fd6a55f/15471254700.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_off0000d13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13C 4664 bytes
SHA-256: 20e6ee979a943a429da82b9bd41912ce5a6c38777eb33131f0a09d97f256b20c
font_01_sfnt_off0000e10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10A 12596 bytes
SHA-256: 925e5ea07e7c51c196fe4c2adbd53aee106e8aa1061a4293545210c225664132