Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8a8b5616e34daaf…

MALICIOUS

PDF

42.8 KB Created: 2020-10-10 03:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7ee797c76c17d9e1e7f8605588dc7912 SHA-1: eb2d0c002b36257afadd6be5f1a4410d5733301f SHA-256: b8a8b5616e34daaf6b0204db59ac235305cb7976b352fd38f9ba97aa21f04306
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, disguised with a keyword related to video game cheats. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute malware or phish users. No scripts were extracted, but the primary attack vector is the malicious URL.

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://cctraff.ru/strik?keyword=sims+3+pets+cheats+xbox+360 In PDF document text
    • https://site-1048224.mozfiles.com/files/1048224/nuwuxok.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/palomuwitid.pdfIn PDF document text
    • https://site-1043495.mozfiles.com/files/1043495/77919348911.pdfIn PDF document text
    • https://site-1038861.mozfiles.com/files/1038861/rukebidovovako.pdfIn PDF document text
    • http://fevovovu.xboxrepairlakeland.com/uploads/1/3/1/3/131383791/xazoravopuzujizagome.pdfIn PDF document text
    • http://siwuf.scottyburford.com/uploads/1/3/1/4/131454526/gaveji.pdfIn PDF document text
    • http://sadap.lowcountrymodela.org/uploads/1/3/0/8/130874655/e39ffd.pdfIn PDF document text
    • http://savagume.azgpc.org/uploads/1/3/0/7/130776031/lofidelujif.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/1/0479/2192/2215/files/star_wars_the_last_jedi_kickass.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/full_abbreviation_for_received.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5994/4865/files/articles_of_confederation_worksheet_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4595/9845/files/pasamosipovugifolamopepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d099764-2d2b-4edf-b1e2-15acc51f9455/99642990297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f444b5e-67ae-4ae1-bdfd-ebc0409aedac/xarobipevepidogelekovu.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_off00006808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6808 5816 bytes
SHA-256: 981ecf48a86df8aa3094a5860481340849ebdae6994a0c138b7e886b9dbd4fb6
font_01_sfnt_off00007ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA9 10072 bytes
SHA-256: d6158c666359c51cc379ffd45d5b848c3fc189409c7d4b8ab46f6e9ee6267271

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