Malicious PDF — malware analysis report

Static analysis result for SHA-256 a573f8f628685db2…

MALICIOUS

PDF

63.0 KB Created: 2020-10-17 05:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ea56251a7f06387c7df6716d4c02adc2 SHA-1: 94134e7c8ecd1bca3cb2382db581fb056190f29c SHA-256: a573f8f628685db2ee4f6e71fde6ccabd6778c3732a4c237d4084bcadd3ed8bc
184 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, with one identified as a known malicious redirector. The document appears to be a link farm, likely intended to manipulate search engine results or lead users to malicious content. The presence of multiple links on disposable hosting further supports a malicious intent, possibly for SEO spam or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/123?keyword=%25D9%2585%25D8%25B9%25D8%25B1%25D9%2581%25D8%25A9+%25D8%25B9%25D9%2584%25D9%2588%25D9%2585+%25D8%25A7%25D9%2584%25D8%25AD%25D8%25AF%25D9%258A%25D8%25AB+%25D9%2584%25D9%2584%25D8%25AD%25D8%25A7%25D9%2583%25D9%2585+pdf In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/vulefebuz.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/gebigikixijori.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/vunidixeviro_xitosujitupile_kadape.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/dufonorosum.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/lolelanison.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f87ba9c60f33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f875502cf9ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f89835c3b2fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f8a4f6e52527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f872e2e97471.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9967/1714/files/black_and_decker_weed_eater_18v.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/89985019443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/kadupuwafedar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/fate_of_the_gods_quick_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7612/7394/files/life_expectancy_line_graph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c0cd1e-919d-455f-b473-1cb924fed8b2/pandoras_box_vampyr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32cd8809-8693-45a7-96a6-6ba1a18bdfbe/67939849289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72792a7d-ae3f-4090-a4fa-1c78bcf91bfa/16249048070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6bf7808-17b4-4443-b2ff-549d125b750b/bezemalijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/264100ac-5c60-47d0-9d6d-df31146fde69/busozewub.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000b6eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB6EB 29352 bytes
SHA-256: 1d4dc1393e2daec6565d67412592d57c0cd4a697322c465330b8b869764c52cc
font_00_sfnt_off000068b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B4 4424 bytes
SHA-256: 66b058b419c059225cc5f5947c93d2ac0cca3778a5e1cea1ec37c37e5a4406d5
font_01_sfnt_off000077d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D3 1648 bytes
SHA-256: 71ed7777df633bcdafb221e4b97748f029842b21a6b539cbd3a2681e07eb4123
font_02_sfnt_off00008015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8015 18212 bytes
SHA-256: 682441c400889f905d659cdef2514bc31a6b187391991417648bbb57ec94e159
font_03_sfnt_off00009c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C71 7704 bytes
SHA-256: c625e63b617d3394bfa104c1b793f11bd3db5175af3934195909502a75ae50ba

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