Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8cab9455341dd0a…

MALICIOUS

PDF

46.5 KB Created: 2020-11-04 05:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 66115bb07abd50ecb335931cd38d4341 SHA-1: 652e09490ddaf3f2992bf26bcafd49115e6d888c SHA-256: a8cab9455341dd0a2487cf56b72382e22dab7099985d5db9d41728c96e2e1c8e
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/strik?keyword=hornady+reloading+manual+online+free In PDF document text
    • https://suleduzon.weebly.com/uploads/1/3/4/4/134403341/ditiwaxojejuku-monepak.pdfIn PDF document text
    • https://totixibepetuter.weebly.com/uploads/1/3/4/3/134345693/desadaduwageka-pasufosoxugedej-liwaganobezota-gefepebobet.pdfIn PDF document text
    • https://numuluga.weebly.com/uploads/1/3/4/3/134307024/35960fb6a47.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/1140852.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/jupefapobuxuj_newagad_felaxamogonedo_zepoje.pdfIn PDF document text
    • https://gelekale.weebly.com/uploads/1/3/4/2/134266195/d9d70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5f91e2e9ce9fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5f956aa40593b.pdfIn PDF document text
    • https://sevanilab.weebly.com/uploads/1/3/1/4/131437268/2851860.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/kosipefojaw/banking_regulation_act_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783fbb3a-3e7f-456b-aeb7-72d5306b5bbc/xorik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c459caba-5538-43bd-98b9-9c5f3f69f3f0/best_rom_hacks_pokemon_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/jozexafizugotulok.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000670b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670B 5112 bytes
SHA-256: 4ea71bf908773cb0b58783de1c52ed0f4a39fc33c6236b5b3d1774fff3c084f2
font_01_sfnt_off00007867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7867 10960 bytes
SHA-256: e421cc7658d7eb01641dc2b1711b872c464a4e67cf3fad4022b229e25ecf0744
font_02_sfnt_off00009da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA3 6076 bytes
SHA-256: 476a7f5ad4ca1955f8ba18bdbe3e5e1842c2b9bbc8bbe3e57526feecafd05314

Open this report in the interactive analyzer, or submit your own file for analysis.