Malicious PDF — malware analysis report

Static analysis result for SHA-256 334032db8cd06691…

MALICIOUS

PDF

76.3 KB Created: 2021-04-14 18:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8f25e1c8cced0645c3e1725624c99069 SHA-1: 209a3ce4df252e7955a07a1be78086983179ab06 SHA-256: 334032db8cd066913cfe7990aa248fe37529bb9404f5f951a66ec06a4fbe9da6
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a malicious intent to manipulate search results or distribute further payloads. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest it's part of a larger campaign, potentially using SEO techniques to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/strik?utm_term=java+interview+questions+for+experienced PDF link annotation
    • http://wovemabib.iblogger.org/30422217093.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5feb38cfb1068.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499282/normal_5fc96ad73be18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448746/normal_60170a6af3840.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/hgcVifv/black_girl_zombie_world_war_z.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/aYcXVo4/xebubipixob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494891/normal_601718a42ae18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fevufanitefega.epizy.com/all_in_1_hdd_docking_station_875.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_f766a7bca28b414985ea009a91e817e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ab76c7-f2ca-4f50-9443-ea4745e4904f/50465450576.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_c869d23175f84d148385f07ae669acad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/99935017287.pdfIn PDF document text
    • http://fibalikirikoti.epizy.com/state_of_homelessness_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/zogojagukujijavawobalibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfcf09b-d36b-40ef-b15b-b52e67dd9d9b/what_are_the_major_themes_of_the_odyssey.pdfIn PDF document text
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_e9b154c00c724cfe996d0a71f824936e.pdf?index=trueIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_e940a492675a482e9123567c63211819.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c17c10-45c6-4ac1-92fb-adbca8b4cf84/25069355378.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_off0000ec4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 5452 bytes
SHA-256: 8245336762f4bf7a901932ad1bb482e9ab6d6b4afa7dd923babb59d259eda226
font_01_sfnt_off0000ff03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF03 10760 bytes
SHA-256: 202e3ad03bb7b2d45ac59dc4b02bf2fbd9072d96ac72b2826c918ab51ed25a18

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