Malicious PDF — malware analysis report

Static analysis result for SHA-256 630fc3fb690e9c7b…

MALICIOUS

PDF

40.9 KB Created: 2020-11-09 11:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 7cb1f524128e17b8c5b5640e50395ba7 SHA-1: 42262735cd7ac2d5b2c2fcc5914dba1d5983e9e4 SHA-256: 630fc3fb690e9c7bc5d0b7447c500ff6f9b0f1bef13501df43958511397c57ba
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/aws?keyword=cool+slang+words+2020 PDF link annotation
    • https://wipaluxeko.weebly.com/uploads/1/3/4/3/134346688/xozojezijepeje_wogavabul.pdfIn PDF document text
    • https://gidujinogojavu.weebly.com/uploads/1/3/4/0/134096303/liropizupemaniniro.pdfIn PDF document text
    • https://soremezu.weebly.com/uploads/1/3/1/0/131070226/wakupejurumu.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/56fa3da6-a6e0-4061-b6e5-0c45a5b4e5e9/lakugenowivezaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec429b17-a284-4c9b-9d8e-6de7dd5000b8/84979405124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c9d6e5-59c4-4cef-bde4-abd5647b0682/role_of_operations_section_chief.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8569dc9f-5cff-4767-8b32-d3f390a755de/fazail_e_amal_bangla_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8a06036-da1c-40f0-93d7-2d7784adad16/66905042444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab10fdb5-5a2d-4d21-8f57-f6b4a8b1354f/wuvidavatawiloxejuwup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c271c2-5478-4488-ad0e-75b26b9e5bc8/laludelatijovijiv.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_off0000619d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619D 5264 bytes
SHA-256: 9a86d04b0a7652b1e657de876f8b2e93ddabb7800684f8c0b6f93cb7498c4ec5
font_01_sfnt_off0000739d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739D 10560 bytes
SHA-256: 93fe6df458ae95ba082eb3199583e85e1238b22f7d99c3421472a8dbb438ce75