Malicious PDF — malware analysis report

Static analysis result for SHA-256 c546ba955850355c…

MALICIOUS

PDF

42.1 KB Created: 2020-11-07 03:17:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 3a98c374bc995aa9337e5647895a1c54 SHA-1: b207de5559cfd4c324ad3dd532398ad61ca02051 SHA-256: c546ba955850355c8b012e35d580216a1da3cad89ec9d72f337bff31714c1440
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=case+clicker+gui+v3rm In PDF document text
    • https://cdn-cms.f-static.net/uploads/4423429/normal_5f9ae09bbfc33.pdfIn PDF document text
    • https://wopadutizibum.weebly.com/uploads/1/3/4/3/134306931/2318758.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/ec48b70c-62d3-4959-aab3-c92e64858bdb/74102540141.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/30819064395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e10c177-7c3c-4a6a-a02f-f78cc4a299c2/slope_ball_unblocked_66.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d946e49c-87dd-4099-ace6-6013db5fdf49/puxiledigom.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/7-3_guardian_tales.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/6th_pay_commission_wb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f70df13c-3fb0-4b02-8bfc-f7f9760b7f61/wonup.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/condition_of_not_feeling_medical_terminology.pdfIn PDF document text
    • https://ririvolo.files.wordpress.com/2020/11/77613394603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa3606a6-fdc1-4b88-afe3-d1b92b574ac5/prayers_that_rout_demons.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/94663898891.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_off000066c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C5 5312 bytes
SHA-256: 0ace87e543433bcfc2567c4bcbbe2674cfa4c8fad60fefbc59b70112def522f7
font_01_sfnt_off000078c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C4 10508 bytes
SHA-256: 8726e933b4290f468f0563e99c0936d36e9fcf2dd5fbf07c0b9d1ff83c5fe806