Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc5e93fc2c2c332…

MALICIOUS

PDF

70.9 KB Created: 2021-01-28 15:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 63bf75f00a039667120c2fae01f89c07 SHA-1: 61245f01a45f69d15a14eb2eab9b50f3109dbf36 SHA-256: 8dc5e93fc2c2c332e9da9408fd1e77dfd3f9e69b469afbd1455fcbdc45e1c2a0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to financial information, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wb?keyword=snowflake%20pre%20ipo%20stock%20price PDF link annotation
    • https://cdn.sqhk.co/gemadaruvow/Zg1jeUL/93030668964.pdfIn PDF document text
    • http://org-fruit.space/botany_notes_for_class_11_downloadarsr2.pdfIn PDF document text
    • http://mini-cam-v2.club/vodafuboniduruz9ul5o.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/hegikgi/radiant_heat_flooring_options.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/cgjgLa0/greenpan_set_comparison.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/iivahgR/credit_freeze_experian_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/9hf5Xlq/myanimelist_iphone_app.pdfIn PDF document text
    • https://derovidexaw.weebly.com/uploads/1/3/1/3/131382126/kimabetime.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/jfDeShg/small_town_murders_match_3_crime_mystery_stories.pdfIn PDF document text
    • http://prognoz-football.club/24695935674h3kfw.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/heqgjjh/26361446255.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/zodawanuror/linukobidewogezefufawiset.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/amor_prohibido_album.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/modele_attestation_employeur_cesu.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/ausable_river_fishing_report_below_foote_dam.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/21911534791.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_off0000d707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD707 5268 bytes
SHA-256: f6457a19d644bcaf94b61b9be414d2194549eefedd11a773dfc3efd4a99f7e42
font_01_sfnt_off0000e918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE918 11100 bytes
SHA-256: 780fec2f999ad061b453b69e696ba02f2abc0c3afc5876e1ded14aa6f6547c07

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