Malicious PDF — malware analysis report

Static analysis result for SHA-256 a204972b265af239…

MALICIOUS

PDF

45.7 KB Created: 2020-10-29 12:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d66563c2d75a41582a6fe6660069012a SHA-1: f64167deeae69012e8b87652e045bce260f28b21 SHA-256: a204972b265af2394a29d5ac6df5a18db70bb4bd360f906bec4655972cbb70a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are likely part of a link farm designed to direct users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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/aws?keyword=please+don%2527t+say+you+love+me+gabrielle+lyrics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f8d07ad5d126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5f9a682ac88c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425514/normal_5f994fcb68d6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420588/normal_5f9a4318df244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f8aa6c2f03be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f8938e14dae7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f8f6aa41fc42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f9186f26ed9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f890114d0810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2848/5548/files/luminous_inverter_eco_watt_1650_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3918/9913/files/22682580943.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/zokamas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666e8a97-4637-4151-b0ed-ec72d389aa5a/mipewozamumuxup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e9e9a4-6779-4865-be0e-e609c1e03778/wadasaxonosujuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0387/4967/files/mosefi.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/wilitovutegagaligazelox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3df87ba-1b54-4723-804e-a3d615845860/lumimupetomemuzimam.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/convertible_bunk_beds_full_over_full.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/56913375716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5107/9592/files/86660267455.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/nonuxiratozaputemoserizo.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/peppermint_beadlets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 5476 bytes
SHA-256: e1de4ddec4900fd41542c6797c239dba4a329073b2e86aac8b9821633b0f3bb3
font_01_sfnt_off00007562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7562 11264 bytes
SHA-256: 7edc712eab136d506f7ee07a2c0d127e94cb18a633db7d7304dc53689dd32190
font_02_sfnt_off00009ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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