Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ade3e76a2ab4d2…

MALICIOUS

PDF

75.6 KB Created: 2021-03-21 07:11:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9c45b666b28e1bb63fb092adce881d4d SHA-1: d7e553cf6c48a708487ecadb2522ae35355454d4 SHA-256: b3ade3e76a2ab4d20c9064a7c581797c3b31ce1875688e9b31792ee76d45355b
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains multiple embedded links pointing to potentially malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically identifies a link to 'https://crophysi.ru/wix?keyword=empire+of+the+summer+moon+pdf+reddit', indicating an attempt to redirect the user to harmful content. The document's structure and numerous links suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=empire+of+the+summer+moon+pdf+reddit In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366646/normal_5ffbdb5645cf9.pdfIn PDF document text
    • http://bewizasosu.sportsontheweb.net/rowenta_steamer_handheld.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/quimica_fisica_atkins_8va_edicion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428334/normal_602f1bfbf07c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486351/normal_604e367479a04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitines.myartsonline.com/33493846627.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/jupijajusobazinuvanoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/wevip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/410b3394-9c62-488d-a725-76bb2abd10fb/what_is_the_definition_of_because.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be62554-51a8-4b90-a069-40ea713de861/xerobipolodomova.pdfIn PDF document text
    • https://64e1471b-64f8-4582-b127-b1692805dd1b.filesusr.com/ugd/507a3d_d54a7d2061d94ec9888429fcb43f5164.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e164d0-ee68-45ee-b768-cf35c40a0514/dejipitufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c65cce-b1c9-481c-82ea-d568117da735/pokemon_emerald_complete_walkthrough_guide.pdfIn PDF document text
    • http://dexivovadoxexo.myartsonline.com/7658497106.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/why_did_the_renaissance_take_place_in_northern_italy.pdfIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_6d8b8f87b0c34bea89626c47c21e6282.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce40b6eb-6d82-48f0-8ca3-62585d0ed8a2/maytag_quiet_series_200_legacy_series_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85f9a4c-a277-4981-a266-b024be44b30a/samsung_printer_ml_2165w_software.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/emulator_for_pc_2gb_ram.pdfIn PDF document text
    • https://351e5f87-f9e5-4015-92cd-d601692b9ec3.filesusr.com/ugd/a0d0d3_69add252f4de40d19671f48b4d6167e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/37211134157.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_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 4996 bytes
SHA-256: a92d010d91c4e58f9f32f86b76395cb95972d16b193403334bc4bbefa0261dd1
font_01_sfnt_off0000f963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF963 11276 bytes
SHA-256: 9699d061e620035b9bdbd9783f9645878c73659a67ca61bccf9e23707f8498ad

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