Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce49bf8493b35fc6…

MALICIOUS

PDF

75.4 KB Created: 2020-12-17 11:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d4f411650c5d697f8a5dec25d2c8892 SHA-1: d6580f4c90f51514626caca2b508c6ca2f170047 SHA-256: ce49bf8493b35fc67bc5366263ac3184df982e7536d653007d63e64b80a92c32
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 specific detection name indicating it's a phishing trojan. The embedded URL `https://trafftec.ru/strik?utm_term=free+nmls+study+guide+pdf` suggests a phishing lure related to a study guide. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious intent, likely involving redirection 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/strik?utm_term=free+nmls+study+guide+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bogeguva/cch_prosystem_fx_engagement_manual.pdf
    • https://s3.amazonaws.com/tulosa/xukudawige.pdf
    • https://static1.squarespace.com/static/5fc7b76aaa0dc1643a333753/t/5fca6f2e3a76450e0881019b/1607102255278/escape_plan_1_movie.pdf
    • https://static1.squarespace.com/static/5fc0dda31452f90b7fe53205/t/5fc228019b1ed0353824c349/1606559747714/70953081567.pdf
    • https://s3.amazonaws.com/memul/d_d_5e_character_sheet_online.pdf
    • https://s3.amazonaws.com/vukumesoj/29122844233.pdf
    • https://s3.amazonaws.com/bejideba/lomewawosibasojul.pdf
    • https://s3.amazonaws.com/nijosinizo/44014157779.pdf
    • https://s3.amazonaws.com/gurupixabogivaz/gb_whatsapp_v_8._00.pdf
    • https://static1.squarespace.com/static/5fce2c05c1e311104da65a8a/t/5fd72385d654060362e1474f/1607934856865/xeritijiduxafewo.pdf
    • https://uploads.strikinglycdn.com/files/a8d5e8d9-f249-461a-b419-b965589d9190/jeep_jogging_stroller_green.pdf
    • https://s3.amazonaws.com/vebogotexaf/pajepabazuga.pdf
    • https://uploads.strikinglycdn.com/files/6a471179-9361-45b1-8234-a07f72e89727/moviwivudasoba.pdf
    • https://s3.amazonaws.com/fodose/9442972515.pdf
    • https://s3.amazonaws.com/kavitokolezub/bernoulli_s_equation_application.pdf
    • https://s3.amazonaws.com/zafaronivaj/doss_ds-1168_bluetooth_speaker_manual.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_off0000dcef.bin
25bb59c5fb1e84c46adfb7ef514722e651265edaff92f6af6f682917692d3ffd
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 4980 bytes
font_01_sfnt_off0000edcc.bin
e766b3318b30626872357f4204d59e645dc50d1c4b84bccb8ddaec2ea1ec8265
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 10740 bytes
font_02_sfnt_off0001128b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1128B 4324 bytes