Malicious PDF — malware analysis report

Static analysis result for SHA-256 870070f1ae5affd4…

MALICIOUS

PDF

73.2 KB Created: 2021-03-18 03:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e72424b28610da9d9062f784d3ecc9ee SHA-1: fbc45a78f58b34ae95879c8287025921b7bf7737 SHA-256: 870070f1ae5affd49b11199e65e7e9739d419512e041572103e555af6bdf0e3a
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with the ML classifier flagging it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a large number of links, suggesting a phishing or spam campaign. While no scripts were extracted, the presence of many external links points towards an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://seumenha.ru/wix?keyword=when+burgers+attack+level+8 PDF link annotation
    • https://cdn.sqhk.co/koroxofusino/B6jahjk/frantic_synonym_words.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/jeUhPig/66638337188.pdfIn PDF document text
    • https://mevemedetu.weebly.com/uploads/1/3/1/8/131871578/1869384.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/rii_keyboard_keys_not_working.pdfIn PDF document text
    • https://delosixopefo.weebly.com/uploads/1/3/4/3/134344482/panavaf.pdfIn PDF document text
    • http://zagozogenef.sportsontheweb.net/pajageminesidagogi.pdfIn PDF document text
    • https://gazumewus.weebly.com/uploads/1/3/4/9/134901575/faduvesibani.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/29807387891.pdfIn PDF document text
    • http://wersita.space/vegan_recipes_for_dinner_quick4q2ov.pdfIn PDF document text
    • https://zeposonuvijuz.weebly.com/uploads/1/3/4/7/134702940/9b20c4.pdfIn PDF document text
    • http://indonesia2health.online/xoxiwjmh9j.pdfIn PDF document text
    • https://zinobelusetepi.weebly.com/uploads/1/3/5/3/135318062/lerepuxujijus.pdfIn PDF document text
    • https://cdn.sqhk.co/tavolimogid/Riav3je/45961189566.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/74450311724.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://petojijoxura.onlinewebshop.net/35607644524.pdfIn PDF document text
    • http://gupatevefojip.myartsonline.com/takelodidobogeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aed2e61-074e-4d03-ba74-1e56c83fa865/what_is_personal_accident_insurance_coverage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7adc6c53-e1bf-4031-ad93-1ab106f6b938/bowflex_xtreme_2_se_workout_videos.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/new_testament_bible_trivia_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25376dd4-ccec-4965-9ef5-33f26c79f898/16846769504.pdfIn PDF document text
    • http://miwewugewu.atwebpages.com/zupisadagosujotir.pdfIn PDF document text
    • http://faleferesevo.onlinewebshop.net/2005_honda_odyssey_shifting_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b7541b-7ade-478d-a4d8-0356ffe14f44/vocabulary_workshop_level_d_unit_8_synonyms_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c28be8-304a-4ffe-9780-88ab2cbf3eaf/10610885627.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_off0000d2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D0 5256 bytes
SHA-256: f755b403beaeb34484fee1adec9edccebbb5d9b1befa4d9943a607775db36a78
font_01_sfnt_off0000e4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AF 10688 bytes
SHA-256: c09dacecabe4be2588e4ead2188005f5d7669f84e6309bc6ac755b95aae7a025
font_02_sfnt_off00010929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10929 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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