Malicious PDF — malware analysis report

Static analysis result for SHA-256 933022208813a6a3…

MALICIOUS

PDF

70.2 KB Created: 2020-12-22 07:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c6f2c83066e636ad59f4f1f1d22ebd28 SHA-1: ee8242e45ec7be7bb10b5e0c013bbad928bbb64c SHA-256: 933022208813a6a38e3edd84774b10c35312219ea73cc42eb1f1e83c09c7d7d5
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirection and link farming, specifically pointing to a redirector URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded content, though obfuscated, appears to be part of a lure, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=infinity+ward+games+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5fa12f7d819f5.pdfIn PDF document text
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/4317122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423145/normal_5fa74e2c8eb2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464707/normal_5fdd862f91d23.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3532345.pdfIn PDF document text
    • https://pemogadisazur.weebly.com/uploads/1/3/4/5/134583379/7123334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422372/normal_5fa9c6b57582c.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/be18fe7b-1943-4b0d-8a73-a74c9d7e88b4/uzumaki_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71c0ddd-9b14-4d33-bbbd-0b34cc5843e9/52419531249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5386cfa9-00be-44a5-ab3e-1661b321e397/surface_area_and_volume_of_a_sphere_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb25b535-7571-4f81-9aee-a38ec34f2727/fijegudazegutepunojuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6e8fbe-a532-4713-8f55-1f38668ec3ab/garbage_truck_toys_videos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc169f3e2fce462bc8f8ca6/t/5fca18a587b36f46d4072e47/1607080107041/flow_sports_tv.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 8

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_off0000d439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD439 5808 bytes
SHA-256: e4038d48d9b6d28aaee9990a8de56c000e767b227da39cff581e3c46250489fd
font_01_sfnt_off0000e80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80A 10696 bytes
SHA-256: 823854bfc75e24148db170dc167b474bc06d3e10efdc4501ea8ede0eca2dc621

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