Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5337a8fd10c7bd…

MALICIOUS

PDF

71.5 KB Created: 2021-01-18 17:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d4853cec8d1525dcfbdbfaf4053b01cd SHA-1: ebe5c46853fef78075df873a62c4339f053c45d5 SHA-256: 9f5337a8fd10c7bd93c4ee3f2c2a6d2d8a5eaa3c3d9fe755a92c38fd624a8a7b
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to 'traffnew.ru', which is a strong indicator of phishing or malware distribution. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI is the primary indicator of malicious intent.

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://traffnew.ru/123?utm_term=bissell+hard+floor+cleaner+cordless PDF link annotation
    • https://site-1174578.mozfiles.com/files/1174578/poopsie_unicorn_slime_surprise_pink_rainbow_assortment.pdfIn PDF document text
    • https://site-1172119.mozfiles.com/files/1172119/79356426895.pdfIn PDF document text
    • https://site-1178114.mozfiles.com/files/1178114/manualidades_con_botellas_de_vidrio_navideas.pdfIn PDF document text
    • https://site-1177754.mozfiles.com/files/1177754/hearts_of_iron_4_kaiserreich_russia_guide.pdfIn PDF document text
    • https://site-1168250.mozfiles.com/files/1168250/xikasapibojedeje.pdfIn PDF document text
    • https://site-1177946.mozfiles.com/files/1177946/ryan_s_world_ninja_warrior_shadow_box.pdfIn PDF document text
    • https://site-1247186.mozfiles.com/files/1247186/45412066421.pdfIn PDF document text
    • https://site-1176787.mozfiles.com/files/1176787/xukozezowejifumelabolaro.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/vapelurowar/50237803043.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/skinny_love_chords_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/dazoviriwarijatenedolefom.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/jopeganusubevule.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/tupaf.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/bonjour_software_for_windows_7.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_off0000dbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEE 5160 bytes
SHA-256: 11c2317f6d4eba1c6f6b9eab5d4148958e5bea9fe1d08c3a2a00e8525a8803d6
font_01_sfnt_off0000ed71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED71 10508 bytes
SHA-256: f648a591c6857345849f6e2d3acc0d3bbae00eecf6174411869e20a3812a9fc7

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