Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f608920e7231f0…

MALICIOUS

PDF

41.4 KB Created: 2020-10-15 03:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: ded977e47f762df3329ce9ad5af5b696 SHA-1: 1944f29cb2a6840b4020c17afeb69de637267b76 SHA-256: f5f608920e7231f0ff8f59e8dae729721a342ad797935c59e368e8d570544f41
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://cctraff.ru/strik?keyword=gta+liberty+city+apk+data+revdl In PDF document text
    • https://site-1044057.mozfiles.com/files/1044057/16329058826.pdfIn PDF document text
    • https://site-1041086.mozfiles.com/files/1041086/66172064015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f8741679d531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f86f4dbbe88f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f87582d4041b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f871160bd0d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f875a1f1c2c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f873f5964702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f878d554f3ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f877b5e1ad83.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/f694906a-87e4-4951-a37b-d1491e3cb4c3/xujibetuwikijigumowipemow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb730b81-4c8d-43fa-9d4d-159df503c196/63236958002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36aa1852-194c-4ea4-9ca9-dfa1241dccaf/6583344089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d84e8f0-3f7f-4c97-85b3-6b29c20598cb/dibulep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4171/6389/files/causes_of_imperialism_in_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/xovebomejudivilelo.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BB 5288 bytes
SHA-256: b23fbf34ed69d46b5fe0f0548499f7a931c5d510db431c8c07ab760f3c42e081
font_01_sfnt_off000075d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D1 10164 bytes
SHA-256: 5f378525378d8f778be477692cbd2703b697fc1f4ee8421e34f10ab59382278e

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