Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8628991f8c5d6d7…

MALICIOUS

PDF

84.8 KB Created: 2020-12-15 14:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9e79094884a660febf84c4fb2d2dcec6 SHA-1: 023da81973fa3e26e9b40373f66ddd493316300e SHA-256: c8628991f8c5d6d7d30a7ff265b3750ca360580796d9dfee064e60f0e5237fca
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to a link farm designed to generate traffic. One prominent URL, 'https://gettraff.ru/123?utm_term=protestant+ethic+and+the+spirit+of+capitalism+pdf', is identified as a malicious redirector. The presence of numerous PDF links and the malicious redirector strongly suggest a phishing or scam attempt, likely using the document's apparent topic as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://gettraff.ru/123?utm_term=protestant+ethic+and+the+spirit+of+capitalism+pdf In PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/zosiwonetikulufu.pdfIn PDF document text
    • https://vufupobuzalezu.weebly.com/uploads/1/3/4/8/134853030/daxusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5fa969f4391ba.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/fijebogejew-wawil-welarifuvizabi-nunoj.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/kibunawoxema_nofufomosal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408481/normal_5f9a42ec1d68a.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/vinivuxo/lozemumutolatobegix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb205e8e827d4288adb3/t/5fc165fd9b1ed03538108199/1606510078116/kugunelufusa.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/neurontin_weight_gain_information.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5341a5e8e827d42aa0371/t/5fc818327ff5a343ebe72927/1606948918613/blogspot_design_templates_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6806ca3bf4b14abcfadcf/t/5fc70281ad3e6411923b57c0/1606877825510/41022735140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95773493-3cdf-4781-94ed-f7f53b830496/pemipojozapotigagobisipa.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/niwazurujuturu.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/boresuxof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc188b1c89e1c4b8fc2eaf8/t/5fcb0d46a51c5a1401a32474/1607142727226/final_fantasy_brave_exvius_war_of_the_visions.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_off00010e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E64 5396 bytes
SHA-256: ef61648dab4649fd7d04f13da360387f8e1fa25ef048cfb9a343ba1212f5dd00
font_01_sfnt_off00012093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12093 10960 bytes
SHA-256: 9e0bf0ee35daaca75729e3c7d97024fd737ebcbed220ba5a5df261f0f82152bc

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