Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cb71520835a615…

MALICIOUS

PDF

62.1 KB Created: 2020-10-28 02:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2d7ba88a16df7a5c26c31a4fa5b78db6 SHA-1: 5c854fadbe182c2f9be7c72f0b4812823435f93e SHA-256: 14cb71520835a615c66d31a1d1a15da12d55a51e569a021e582d1a23cebbc98a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristic, suggesting a lure for users to download software. The presence of many external PDF links further supports a link farm or redirection strategy.

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://ggtraff.ru/strik?keyword=cyberlink+photodirector+7+deluxe+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f96dbdce56aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f948503d7345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379483/normal_5f8b5bda7342e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_5f914c6240cd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5f941a91ca9be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_5f8dc8fcacc26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_5f9838d3e5c1a.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/6d3b2988-da70-4392-8ffb-4adcbba5fba7/48287848983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6381971c-86bd-4326-99ac-95fbf82c7de6/rodexonisuzut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f69ab05-6c6d-4127-a543-3defed6442b1/tools_and_techniques_of_estate_planning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2178c6-b9d5-4d1b-933c-eddeaaad0ba8/lozabigaf.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/janigusebidasodogodukodox.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/automatic_voltage_regulator_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0300/2019/files/innova_dog_food_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/supprimer_une_page_facebook_avec_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1701/3912/files/html_to_converter_online_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4854/1594/files/temp_root_remover_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/58253186958.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/absa_premiership_fixtures_2018_19.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/69583817196.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_off0000b231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB231 5436 bytes
SHA-256: 1c7f63874d339edcca741a86417905353857d8306cd751f65573c42b4bed05d1
font_01_sfnt_off0000c4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BA 11120 bytes
SHA-256: 66e3b84ac44f37986cb5dc579ac5c5ae4de6516263827cc277459a056dc5d253

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