Malicious PDF — malware analysis report

Static analysis result for SHA-256 da63ec7fb2b790cd…

MALICIOUS

PDF

79.7 KB Created: 2021-03-14 19:57:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 59548bf3fca18118b375aa4dd4d6f7d2 SHA-1: 16370452916f2eec8bf0a7e74fce4b2b0d573170 SHA-256: da63ec7fb2b790cd1a2092ffd54372561952325485511014345713b7eb883023
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The embedded URL 'https://mezovuduw.ru/wix?keyword=sealy+pillows+memory+foam' indicates a lure to a search result page. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to SEO manipulation or redirecting users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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://mezovuduw.ru/wix?keyword=sealy+pillows+memory+foam PDF link annotation
    • https://levarimabogi.weebly.com/uploads/1/3/5/3/135328943/pabuberevenupuzuk.pdfIn PDF document text
    • https://vutavevivusupe.weebly.com/uploads/1/3/0/7/130776898/a899e7.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/6hjje8e/free_things_to_do_near_me_this_week.pdfIn PDF document text
    • https://dukopovofozevi.weebly.com/uploads/1/3/5/2/135295758/c856ebd.pdfIn PDF document text
    • https://tazumeter.weebly.com/uploads/1/3/1/4/131438167/zukosuwarab_zexesomewenat.pdfIn PDF document text
    • https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/siboravabuka.pdfIn PDF document text
    • https://futinubub.weebly.com/uploads/1/3/5/3/135328842/sasaveme-datikugirege-bowuriv-wowefebevit.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/gibBTA1/displacing_indigenous_peoples_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/icJiT9X/carmageddon_max_damage_wikipedia.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/dJbc4mU/how_to_recover_my_old_photos_in_friendster.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/h0idwSl/dreamstime_sell_your_photos_apk.pdfIn PDF document text
    • https://xavaruren.weebly.com/uploads/1/3/1/3/131383751/747f6e10.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/8c267498-33bb-42e7-aa37-00205cb709c7/microsoft_project_download_trial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289e69c0-7294-4071-91f2-e3c4e46ac97e/64542173509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4f39cf-e652-4306-ab19-c639d6cc1035/77223429354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70360ff0-7c16-446c-a17f-327c600f1f8f/hp_w2338h_year_made.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721d0086-0f84-4108-89d6-537a761937dd/electrical_engineering_technology_jobs_in_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebdf6537-980b-426a-9409-22884fca0893/icom_2300h_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4feffc56-1a07-41f3-bb4a-e904110e501f/2985960826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8edc5320-cc8d-46db-812f-6eddb27c4cb6/givupuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c00196-6cc2-4f0a-8a5d-43ca6fd804ae/blue_iris_app_notifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2807b68-47dd-41f5-8d46-04b7a636c917/install_inkscape_on_chromebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b8dcdc6-f659-477b-83d4-9b2cb34cef37/musuvimuwesilara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2473e85-4102-4bb7-ae67-efc65cb417e0/bram_stokers_dracula_cast_lucy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f76c1425-ac40-4678-9ec3-a02f060f03bd/lufus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d88d659e-082e-4e0e-9bff-af6e65dab46f/dawubanajonewomavemo.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_off0000f93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93B 5344 bytes
SHA-256: 9d06c06b7a5790d8fb462f305d3b59fbfb8f0e145f4b7eb69452c9ef4ad5df60
font_01_sfnt_off00010b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6B 10584 bytes
SHA-256: 076030043df2fcf9b4c96b7cdd95c5f761f5a088609a354b74e94700bc74b1c9

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