Malicious PDF — malware analysis report

Static analysis result for SHA-256 976479cedff381b4…

MALICIOUS

PDF

41.9 KB Created: 2020-11-09 11:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d09ea5aca4c047991dbaaa47ded1931e SHA-1: 7947c1ffbca74863b92ab3d221eb49d0d31eb8f2 SHA-256: 976479cedff381b41f41db3f421987cf1493f67075e25ec00669d2e3a2edfe54
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with at least one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely intended to lure the user to malicious sites, potentially for phishing or further malware delivery.

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 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://gettraff.ru/aws?keyword=white+space+is+not+your+enemy+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451542/normal_5fa24d8d931d0.pdfIn PDF document text
    • https://vifoxofanope.weebly.com/uploads/1/3/4/6/134670603/sabatarokikokadeviwa.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/furufoge_vosetakox_juxiw_fanisivozaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f87629b38259.pdfIn PDF document text
    • https://xuvuluvibes.weebly.com/uploads/1/3/4/4/134494650/5e6660c38937051.pdfIn PDF document text
    • https://gutawiwexuzoti.weebly.com/uploads/1/3/4/4/134477232/88bc7.pdfIn PDF document text
    • https://dumejolizaxoko.weebly.com/uploads/1/3/0/8/130814858/gabomivadi.pdfIn PDF document text
    • https://tevitoretej.weebly.com/uploads/1/3/2/6/132680933/nevobizewugojow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5f926e8226d4e.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/18e45bb8-265c-416a-a9c1-c7b72f277e55/ligodevuliximomokewaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d4c569f-18b5-46f4-8cf9-e0f5a9fc710e/barapalunogafenowinuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7d3a3b-55d4-4a82-b8d2-fbb2c5794b75/62720238499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be693db-8803-4b5d-b0dc-5786879096dd/liwetogefipukiposes.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_off000064d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D4 5480 bytes
SHA-256: ec8aa068b15185b014a0862c407daf353724b065fe8e0c8b4d1655f4f5c4ce79
font_01_sfnt_off00007762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7762 10380 bytes
SHA-256: 9500db184d81ad68aa99d1e4b2265f4680d3ef7ff7f80e0492fa714041c3c8db

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