Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabc4a10fde4b4a6…

MALICIOUS

PDF

66.4 KB Created: 2020-12-01 06:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 404e4394abd6c26c3a0990e140bcfc6c SHA-1: dfc35dedf1a4add573f1b393dcf85aab6b1e0ea1 SHA-256: dabc4a10fde4b4a6518aea9b9bbce5414ee29016e59dcc1303fba15b78690d22
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=jack+reacher+rules+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=jack+reacher+rules+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_5fa26ecf6f59b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413017/normal_5fc2d67e6550f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5fbc9faf78c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5f8afeb4f229e.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/5fc069c17d0c8f249d3e4d8d/t/5fc10d813485235c86ebce24/1606487425869/how_to_string_a_violin_with_fine_tuners.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/tutusijusugobexaboxomore.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37f170b6b03258f45d436/t/5fc48a7a3c02f22b9d9e379a/1606716026722/62035712330.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d446ab79f442f2293e00/t/5fc2a1725147b1480488d685/1606590837110/82330951854.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/mufagibiwode.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/10620743883.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/fekajozokebuzedegusup.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/100_most_beautiful_words_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/49296827496.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_off0000c7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A8 5296 bytes
SHA-256: c68e5b335a4461f54fe300d9450d8afa2c718e1672b1c2da36b6bd14468a928e
font_01_sfnt_off0000d9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A6 10520 bytes
SHA-256: 98ecfad719f06dc5394f47f7b1519ee3939d7823c57bc38809442800c24cc630

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