Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3f5b413109ed9d…

MALICIOUS

PDF

75.8 KB Created: 2021-03-19 20:33:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 64ffaeac5b517803f7714bd52558000a SHA-1: 8d12b1894c17889b51538c0c8d08515b8cb266d3 SHA-256: 0a3f5b413109ed9d86e73849f4042e03713124cbab254f2ea93c76a5868a211d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/123?utm_term=battlefield+2+bad+company+android PDF link annotation
    • https://givozerav.weebly.com/uploads/1/3/2/7/132710596/7671352.pdfIn PDF document text
    • https://zogomidovuga.weebly.com/uploads/1/3/1/6/131636914/3f5c7bdbe7b.pdfIn PDF document text
    • http://ragukonoroso.iblogger.org/73491008019.pdfIn PDF document text
    • http://superheatbelt.xyz/get_anyone_to_do_anything_review66bjy.pdfIn PDF document text
    • http://discount50it.pro/chapter_13_budget_worksheetkrmji.pdfIn PDF document text
    • http://fb-pageunderreview.com/how_to_make_brown_color_by_mixing_two_colors4w7q0.pdfIn PDF document text
    • http://jufawet.iblogger.org/e_coli_file.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/78278915-3e37-4032-8adb-93d5d1f6d288/jokiwawuwaxitos.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/marketing_plan_presentation_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c8dc28-97b0-4757-acd1-2709f6065e8b/shoot_em_up_full_movie_2007_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/modern_handwritten_calligraphy_font.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/military_statement_of_service_template_army.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/70570942630.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/adobe_photoshop_cs2_tutorial.pdfIn PDF document text
    • http://putesedesupelo.epizy.com/1039706063.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/9781546318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a3cc187-4131-48a9-b69d-a526ced5f3db/montana_1948_audiobook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/73108551077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c1a920-d88e-4b11-b279-dc57e4924cd8/jonulobemariretunefubo.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_off0000df5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5F 5544 bytes
SHA-256: 8e8c037f31d87efc08e36192267675605176672115e3d0aeb0a675644342f540
font_01_sfnt_off0000f231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 21376 bytes
SHA-256: 7c4f672bd96b177fcc3a2f0b03fb55ff0128af73056d9094ae29d02dfe6b4b25

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