Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e51f42639b4089…

MALICIOUS

PDF

43.2 KB Created: 2020-11-08 04:04:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4365da043f3eee5825dddccdcdccfd66 SHA-1: a383da4b75bab4708f041352027114c2c5b1e0f9 SHA-256: 58e51f42639b408930779da4b41f4c48e35a1060de58db263d0b3acbc22d739b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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://traffking.ru/aws?keyword=bad+company+songs In PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/kajaloluwen-nixakezefurix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5f8f970cbecdc.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/zoduvevokisit.pdfIn PDF document text
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/39ff3590d2a2.pdfIn PDF document text
    • https://jipepusubame.weebly.com/uploads/1/3/4/0/134040653/1781280.pdfIn PDF document text
    • https://fusorebumobem.weebly.com/uploads/1/3/3/9/133986296/8502861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_5f932e529a06b.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/sikalerewalukupis.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/rotowan/61969129735.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/discord_account_generator_for_tokens.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/53657103317.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/widupalawipemizikitavo.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/86843876194.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/joe_jorgenson_presidential_candidate.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_off00006ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD0 5416 bytes
SHA-256: d56a404c9f1317497450e1a21cc0f042e43325426e4988cfda93e6f5b1cc2858
font_01_sfnt_off00007d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3B 10356 bytes
SHA-256: a258f284eabb4c40bb0fe1a681c8ba83d564f768ae97086fd4321252e0cda3e2