Malicious PDF — malware analysis report

Static analysis result for SHA-256 97eaad513de62c78…

MALICIOUS

PDF

105.6 KB Created: 2021-03-16 21:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a78d20518ba429e8728d6123bb2b79e3 SHA-1: 95f598297b994926de2cd1ced21db77f3020ec58 SHA-256: 97eaad513de62c785fcbe3843a357fb430904390db18d2bb742a72e7c8ee748c
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 0.9987

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://jottigo.ru/strik?utm_term=xfinity+x1+tv+box+setup PDF link annotation
    • http://xtw2.club/larowomizizubixabec64rk.pdfIn PDF document text
    • https://tusopapa.weebly.com/uploads/1/3/2/7/132712380/xasuvinabowuwegogo.pdfIn PDF document text
    • http://tuimag.ru/zipafakosutifadilqj82t.pdfIn PDF document text
    • https://cdn.sqhk.co/pawijilabu/T4jgnMS/magic_spell_words_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/jgfNifQ/how_to_enter_goodreads_giveaways_on_app.pdfIn PDF document text
    • http://servisvds.ru/minha_vida_fora_de_serie_2_gratis95nkn.pdfIn PDF document text
    • http://chisto-chisto52.ru/4126088695221tic.pdfIn PDF document text
    • http://creamwalls.online/wendys_chocolate_frosty_calories_medium083f4.pdfIn PDF document text
    • https://cdn.sqhk.co/xadelakora/gKIUhbf/basketball_reference_3_pointers_made.pdfIn PDF document text
    • http://arfeshome.com/how_to_add_beta_symbol_in_wordgdmyi.pdfIn PDF document text
    • http://pasendapp.online/digital_marketing_course_london_frees5ads.pdfIn PDF document text
    • https://mubazujozij.weebly.com/uploads/1/3/4/7/134705676/8384811.pdfIn PDF document text
    • https://xofiguguja.weebly.com/uploads/1/3/2/7/132710561/4118886.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/kgdjbqM/taz_angels_miami_house_address.pdfIn PDF document text
    • https://cdn.sqhk.co/lizubenesowi/a1gijiZ/stacked_crates_bookshelf.pdfIn PDF document text
    • http://comforfemj.fun/what_is_chill_mode_teslad594l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_b8abfd9ebf3749109aa728acf596ef2b.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_35af8508165747e6ba1933eba944b5d0.pdf?index=trueIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_406603ec0f684063b5082feddc9908ec.pdf?index=trueIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_bc898889f6ce40e58515344e35b95ae7.pdf?index=trueIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_eacd502d16fa44a7879ee11948822aed.pdf?index=trueIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_811c5431d7104722bcd6dedaa32a8ec6.pdf?index=trueIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_6ccca39558c04d8084a9906fd734c83b.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14264 8688 bytes
SHA-256: 3abebb8dafa15914bff072c4d44aea4f3ef40706396f91847a47a9c8a83e0daa
font_01_sfnt_off00015f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F23 4956 bytes
SHA-256: f2ecb7f82da745f7404b56637dafbac61e273741765a1808d5bd7e46f8cc25f1
font_02_sfnt_off00017030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17030 11880 bytes
SHA-256: 4d8e3c25c6a9d1f76d86ad4292a04c035bd3d93e874f8170e5d9f0d3dd59ebf0