Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd2113d34adcf14…

MALICIOUS

PDF

34.1 KB Created: 2020-10-23 15:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 16d7155a87c3d4033f942aecaa308689 SHA-1: c1884f2ed122d6f568ed8baed35f03595cbe53cf SHA-256: 3fd2113d34adcf147cb5d6e83902eb473660b6885e5174f61eedb2d4a5eab1a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though malformed, contains text related to a map worksheet and a URL that aligns with the malicious redirector heuristic. The presence of numerous external links suggests an attempt to manipulate search engine results or redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 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.
  • 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://gettraff.ru/wb?keyword=europe%201939%20map%20worksheet In PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/805149.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/8005743.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/8a98ea80e.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/bagisegodex-famasunaxuku-bugofotebisig-sisajiriwa.pdfIn PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/jafupebutobur.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/6916886.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/117_bus_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/mufinetotexudanar.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/menalulov.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/buzikodopekado.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/cadena_de_suministro_de_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/bagirirovisepofepevu.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/pazevuzinuvovaseva.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/83184266290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb72809-4025-4b87-bafe-37352a6cf2b6/guxupuwubogetikokomedaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce965408-663c-4158-9efb-af107450d454/google_play_store_app_install.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b1c365-261c-42a9-adba-e8d704b73f31/1282934579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6808/9026/files/spotify_premium_apk_offline_mode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4347/1008/files/is_sammy_alive_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2307/2921/files/74326673580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7125/7241/files/ray_diagrams_for_convex_lenses_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3328/7592/files/17985164046.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_off0000493a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x493A 5512 bytes
SHA-256: e1249915cad94db16031328a3f2059b92c2c8a0ac1d7d90ba839234c40ba3990
font_01_sfnt_off00005be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE8 9232 bytes
SHA-256: 5c048e846d27ceababb783c399b9dfd65963dd0d077ff20c6ab0c77f5ce6da1e

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