Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fd2e43290e4bf8…

MALICIOUS

PDF

156.0 KB Created: 2021-03-24 12:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d95bd90a8bfcbdbb259a1b7461f6a027 SHA-1: 21e969875836f38cddf5457e9a70490ef577f7c1 SHA-256: 62fd2e43290e4bf8daf50a2dc7a1c1537c2a114f3dd87fab18410be5fd674764
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9997

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://lozipotod.ru/award?keyword=tecnologia+da+informa%25C3%25A7%25C3%25A3o+para+gest%25C3%25A3o+turban+pdf PDF link annotation
    • http://woziwowariv.sportsontheweb.net/91939990949.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/84387656266.pdfIn PDF document text
    • http://sravniproxy.info/vavejcatw8.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/gl5Erhi/mountain_climb_4x4_mod_apk_download_android_1.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/nizejapimapawanowatetomu.pdfIn PDF document text
    • http://carbags.site/how_to_port_my_number_to_verizonsdnxi.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/ijihhaj/65510201119.pdfIn PDF document text
    • http://pisumuvate.sportsontheweb.net/aha_acls_provider_manual_2020.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/2178477118.pdfIn PDF document text
    • http://zuraleres.mywebcommunity.org/duzifabemibiri.pdfIn PDF document text
    • http://ttop-shop.com/free_family_tree_template_excel_with_siblingskjlmk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fec450ea-b80f-4746-b851-35139cc02de5.filesusr.com/ugd/53a83b_1653f7ad5ca042c3be540f0fe401bf4a.pdf?index=trueIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_bab9cce846334df4ae04a3f87e2b6a8c.pdf?index=trueIn PDF document text
    • http://jatitubez.epizy.com/85205436186.pdfIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_824eb42f50ad487dbf44ca4b4cd00e4d.pdf?index=trueIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_ae41b7a257b44581ba06db708ca26f95.pdf?index=trueIn PDF document text
    • http://sudatidi.epizy.com/convert_to_word_free_download_zamzar.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/zojirushi_rice_cooker_cleaning.pdfIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/railway_reservation_form_download.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_2b4575a935974361bc1851990fcb20ef.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21F95 6064 bytes
SHA-256: 7484e2000756d8ccc6c3adce6c043408cfeb0b40f9f75b611852fa5cd3f17e5e
font_01_sfnt_off0002334b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2334B 15108 bytes
SHA-256: 27fdf11aa97596679e3d94deb2b767d15a41cdb9a5d26dfae624af4bd8eca81f

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