Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5c60c3896eb8dd…

MALICIOUS

PDF

72.7 KB Created: 2021-03-20 05:37:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 561d6072adb0ee9f649984cd8c828912 SHA-1: b0e1210004de93270006996ba2a744622c2af193 SHA-256: 1e5c60c3896eb8dddd7592ac9f462e13603d089c336b7b1a01fefcd484d6744c
186 Risk Score

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 0.9996

Heuristics 6

  • 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.
  • 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://resalured.ru/wix?keyword=modern+sniper+apk PDF link annotation
    • https://gazavado.weebly.com/uploads/1/3/4/3/134331045/5779048.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/c9rMiiB/swordigo_snowy_slopes_purple_thing.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/momalapo-tefobopu-litunetotebe-tukemotapomu.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/DegccNE/65206134444.pdfIn PDF document text
    • https://ranetaxute.weebly.com/uploads/1/3/4/8/134886021/mijipoxogiwin.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/0ghifua/ben_10_alien_run_game_apk.pdfIn PDF document text
    • http://xusagonuwom.22web.org/spanish_verb_charts_all_tenses.pdfIn PDF document text
    • https://webegoxu.weebly.com/uploads/1/3/2/6/132682681/28eccc4bd.pdfIn PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/kebikapisukedek_wedemefajige.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/mA2hdhe/carson_city_hotels_with_indoor_pool.pdfIn PDF document text
    • http://fudutotiv.iblogger.org/english_file_beginner_teacher_s_book.pdfIn PDF document text
    • http://manekobe.22web.org/44996730459.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/47b78662-bb84-4dea-b05a-3e9f4364ab72/87198505532.pdfIn PDF document text
    • http://wufalejopasedor.epizy.com/ikea_buying_guide.pdfIn PDF document text
    • http://vigiraporonom.rf.gd/time_number_line.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f0e19ea-2820-47b5-ab50-b079872699d0/career_development_plan_example_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1e3b97-b5b8-4e06-99c7-28203b1baa90/how_to_write_assessment_report_format.pdfIn PDF document text
    • http://mowiredeponup.rf.gd/libro_hermosas_criaturas_saga_completa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5ec3f6-a4aa-45d6-b161-a768afcbdab7/vazowovimedufed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e718d8-1bc0-4c51-a188-02014595322b/where_can_i_watch_the_first_fifty_shades_of_grey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7750fb0e-3a63-4922-9aa8-19deadf6b8c5/is_taylor_gs_mini_good_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372d9642-5bef-4ab0-8734-3ec97cd988e5/25943716543.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_off0000e188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE188 4992 bytes
SHA-256: 480892ac5a7f52826acc9064340da098a968f19e79420c2fd3366672aa718a7c
font_01_sfnt_off0000f29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29A 10372 bytes
SHA-256: 3d41cee65c38fd057e85fc97c3ef6f7e197689f30708dc7b625ee192990cce88