Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1618814a5f37ced…

MALICIOUS

PDF

113.4 KB Created: 2020-12-14 17:22:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1e7f55563f361addfa4fb9934542418f SHA-1: 1d6beb2d0215cf2a068119bd309d100d7f88e0cc SHA-256: d1618814a5f37ced105105802b4c2c5903218efc387510e295c4a9697d1fe39b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI to 'trafffi.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the embedded URI are strong indicators of a malicious document, likely used as a lure for further compromise.

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://trafffi.ru/aws?utm_term=english+movies+2018 PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zidenigad/kifokawoxuz.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/26128690500.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/digital_signage_menu_board_template.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/prison_break_season_3_episode_12.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/uniform_shirt_cutting_telugulo.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/presenting_psychology_rent.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/anti_ragging_form_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/38972709939.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/moselebeko.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/zafupumegetinutira.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/makerere_university_private_admission_list_2019_20.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/jorebesanasofiwuxa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000162c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162C8 5332 bytes
SHA-256: 7e855a1a8a3f7077841148a025e07458e8e970b34505b596b5120bcb7fd9d3c2
font_01_sfnt_off000174df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174DF 15888 bytes
SHA-256: 2c2639e8d9c9e685e123977bf3dd2aeba3aeb41cf77ae5ac9ea9348bf79d3560
font_02_sfnt_off0001a33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A33A 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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