Malicious PDF — malware analysis report

Static analysis result for SHA-256 c794acba1565c43c…

MALICIOUS

PDF

69.8 KB Created: 2020-12-14 08:46:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 90093336cc0ceee095897016ab432758 SHA-1: 9b13b858800ec1fab3c5236c1303bb76300aa19f SHA-256: c794acba1565c43c79f28d087daa45ce5359283ec7ddd06d71a7657f7917200f
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=cotton+ginning+pressing+project+report In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_5fb55f69dd989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_5fa596730c56d.pdfIn PDF document text
    • https://tuwikoli.weebly.com/uploads/1/3/4/3/134312541/wabanu.pdfIn PDF document text
    • https://zipazoraxegav.weebly.com/uploads/1/3/4/3/134325660/ac7e7f28bf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462038/normal_5fb82d5337423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_5fa6426a8a090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_5fa83eebe56dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422145/normal_5f9e4856a2bb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc58d09d49dd1244753da13/t/5fd03d14c0a29916a564ee47/1607482645177/wabirikosetux.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6cf4a579eee3ae0699cf0/t/5fd67d9896ed101a3e44e236/1607892378197/dazotatem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/693ddee3-c3fd-401c-aa1a-8987f843ab48/vertical_angles_and_algebra_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/aiims_rishikesh_blood_test_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/87113069708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/183ef78c-32de-4f82-84fd-38eb2159f8c7/sex_and_the_city_tvdb.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/fusavitilulig.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_off0000d310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD310 4840 bytes
SHA-256: 70a5845a61b945d3d10338e13f86ea01331025b81b5b02f88b3b0ab93424c577
font_01_sfnt_off0000e3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A6 11624 bytes
SHA-256: 0eedca7035ecd1f9508fbe51b7e9648694695b2408329ee94741982d801f1195

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