Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59699405d9440e1…

MALICIOUS

PDF

87.0 KB Created: 2021-03-25 09:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 905a466057f2af36bec4d421a27085f8 SHA-1: c3829f567541d3cbf5fd668c63d32cfa1d0328ac SHA-256: a59699405d9440e1e6074fbf8f6e1c94f4cb63f0b4124c8d21e9f6b1fca2c376
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a link farm designed to redirect users to various websites, masquerading as search results for specific queries. The primary URL, 'https://maypoin.ru/strik?utm_term=2011+honda+cr+v+transmission+replacement+cost', suggests a phishing or scam attempt by luring users with a seemingly relevant search result. The presence of numerous external links on disposable hosting further indicates malicious intent, likely to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/strik?utm_term=2011+honda+cr+v+transmission+replacement+cost PDF link annotation
    • http://widutojudowixum.22web.org/masagiwudokafunuremoripa.pdfIn PDF document text
    • https://cdn.sqhk.co/mipijotom/bExggKt/girl_next_door_saving_jane_cover.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/ytacbib/ice_cream_sandwich_dessert_with_oreos_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/FgjgHgf/crossroads_ford_apex_nc.pdfIn PDF document text
    • http://tifowudadu.22web.org/51960845321.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/w55gc71/sejiwimikem.pdfIn PDF document text
    • http://napexolaworu.iblogger.org/3534012161.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/Umge1N4/dinosaur_bubble_blower_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/UujavE0/ates_ve_su_oyun_skor_4_oyna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://buzuvemujogumob.epizy.com/lovolapowiwopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2939f2-69fa-496b-8a92-9b7a85105b26/bob_books_set_3_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea63ce4-665e-4ee7-bac2-bf2ce34089ff/icse_english_grammar_book_class_8.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_f4f3fafad75c447797488d5523dd3ffd.pdf?index=trueIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_274ad77d3143499bb07da752fb3782de.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bce444d-cf24-434f-9d85-0ceb6f84b2e4/ipod_touch_5th_generation_price_canada.pdfIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_2f89b7ee871549dc86623b6a682f69e9.pdf?index=trueIn PDF document text
    • http://voxotili.epizy.com/free_cornell_notes_template_word.pdfIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_10e77c111d4549e5bddc3690a7e55b2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0049fe0d-3294-4c49-ad3f-2e6c05f5b6f7/bank_exam_reasoning_questions_and_answers.pdfIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_d206a7268304460091ee799ddeb9ca66.pdf?index=trueIn PDF document text
    • http://bowetejatobi.epizy.com/strongs_concordance_1112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c35f2b2-005a-4bb8-9abc-6157b4c73bf7/how_to_fix_the_pilot_light_on_a_hot_water_heater.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10618 5392 bytes
SHA-256: a73113a068d25100fce800f6088b1497a6a78a77a53013beb2aabef90e7e221d
font_01_sfnt_off00011832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11832 11280 bytes
SHA-256: 56f06125524c59cc615e1c43b4cd9f68e93d0d40461ea491d58ced468cfc8757
font_02_sfnt_off00013e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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