Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e408ff0fbe42f39…

MALICIOUS

PDF

76.6 KB Created: 2021-02-15 11:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: fb18e1ad209d0780b5acddd1ff7bc596 SHA-1: 064c23c92cacff5ad73fe082911c9a02c0be2926 SHA-256: 6e408ff0fbe42f394e262ce0b7e4f75c29412e3e8566c5168214f89cb8c68f0e
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a likely attempt to redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed as a link farm, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://jottigo.ru/123?utm_term=stihl+ms180+spark+plug+type PDF link annotation
    • http://greyfruit.space/steam_speed_going_to_0c1f0a.pdfIn PDF document text
    • https://ditakusoboke.weebly.com/uploads/1/3/1/4/131437623/kufit.pdfIn PDF document text
    • https://jenogisemelo.weebly.com/uploads/1/3/2/3/132303080/8354706.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403685/normal_5ffd37174253a.pdfIn PDF document text
    • https://cdn.sqhk.co/wojeberupe/jaBif1p/fezudufivu.pdfIn PDF document text
    • https://punujagenak.weebly.com/uploads/1/3/0/7/130775029/6907813.pdfIn PDF document text
    • https://cdn.sqhk.co/nukuzulu/iiijgjc/best_cookie_maker_fantasy_match_3_puzzle.pdfIn PDF document text
    • http://cyberlife.store/grad_party_invite_template_free5ot03.pdfIn PDF document text
    • http://rajebamif.22web.org/xumuzub.pdfIn PDF document text
    • https://molisepav.weebly.com/uploads/1/3/5/3/135347716/7b847931f091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479691/normal_5fc8cecacc01f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465125/normal_5fd077c886413.pdfIn PDF document text
    • http://nimened.66ghz.com/44622920197.pdfIn PDF document text
    • http://xovitexi.iblogger.org/fonewiralimaxalutel.pdfIn PDF document text
    • https://cdn.sqhk.co/xewasejeve/ajjgchf/warak_enab_in_arabic.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/h2gib1C/rummikub_instructions_in_spanish.pdfIn PDF document text
    • http://iclod.tech/69809995917pl902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502493/normal_5fe7c759f3587.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/dudowesekepose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://degivenumi.epizy.com/lilivide.pdfIn PDF document text
    • http://bizaludewop.epizy.com/bootstrap_file_from_server.pdfIn PDF document text
    • http://jevoneloz.epizy.com/immigration_questions_and_answers_for_tourist.pdfIn PDF document text
    • http://boxokur.epizy.com/31565853008.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_off0000edcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 5888 bytes
SHA-256: 21888282290bb8baa85d3f9ab96331db3d0af0ac9e8b5a15a321803ed487cfc3
font_01_sfnt_off000101b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B8 10356 bytes
SHA-256: b0777d86d18a1feb8171da8e3a83dbded96865fe03de26e48b80b1899c8f408b

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