Malicious PDF — malware analysis report

Static analysis result for SHA-256 800781b59f122ecd…

MALICIOUS

PDF

65.5 KB Created: 2021-03-17 20:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 53794c57a88b5c6af342bed2bf4badff SHA-1: 5aadac09b782d4c7ae634e41cf32091ed4d2f4bd SHA-256: 800781b59f122ecd7c30fcd8fb35703529da49100d2c05c197187d5f79828b6f
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/wix?keyword=ptd+2+hacked+online PDF link annotation
    • https://rugeponejap.weebly.com/uploads/1/3/4/4/134487210/3092108.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/sXhgcfI/gafavekujarevizewesag.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwuvume/0f01bij/basketball_court_length_in_yards.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/kibumewuzamexejobu.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/rasuzadag.pdfIn PDF document text
    • http://benilobodereji.mygamesonline.org/55994165381.pdfIn PDF document text
    • http://gunasog.iblogger.org/the_interlopers_text_dependent_questions_answer_key.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/xakajoziwibi/amd_graphics_card_for_gaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4905646-636a-4488-a502-721ba4d1310d/fluke_networks_intellitone_pro_200_lan_toner_tracer_and_probe.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/35814127818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a398b02c-50fe-4a6e-acdc-91af82c58d28/osho_courage_book.pdfIn PDF document text
    • http://vabagez.rf.gd/16438953293.pdfIn PDF document text
    • http://nuxijezusuwep.rf.gd/log_in_sign_up_form_template_html.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58235dff-d974-458c-92d8-cc238204a64f/garmin_zumo_660_charging_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/medical_terminology_book_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b581d463-0c28-4e69-abd5-371aa213b31a/laratopukifejajowekevid.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_off0000c52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52E 4948 bytes
SHA-256: fa9f6995ac979d3f9ac27a107ed6c6c09d37b538581927a087ea922fdb71a585
font_01_sfnt_off0000d603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD603 10536 bytes
SHA-256: 4c62cac0adb62f3a129a6fc7e30563a451b9d6b56b2948e60cc0d4be27acf35f

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