Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcaa43b02e48d222…

MALICIOUS

PDF

127.2 KB Created: 2021-05-26 09:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2b575c922d332b07fa455fb7fb2c51c2 SHA-1: c4ab0705e595d893f7171b56c14766f443c7b1d2 SHA-256: fcaa43b02e48d222d93010bb386d5f7d1f88d0a55d76857ee3ad60c5846010b4
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, specifically as a phishing trojan. It contains an embedded URL that redirects to a lure page for a "Warhammer 40k 8th edition rules update", suggesting a phishing attempt to trick users into downloading further malicious content or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://soxebez.ru/strik?utm_term=warhammer+40k+8th+edition+rules+update PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383574/normal_606a2e429a301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368487/normal_5fe17cf50d94e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497650/normal_5ff535fb4adaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476002/normal_603d07720d756.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374979/normal_6006de6a2c574.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459623/normal_5ffa11aad96d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rutufokedizon/wusexarevigoxosasibeso.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/gafafuxuginozet.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/64455783763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d8d5afe-42c1-47ea-b68b-47df66c94699/karcher_high_pressure_cleaner_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7509bf-fdfd-4921-a2a7-5ac5da1e9f9a/how_to_use_flex_clean_on_kenmore_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b19af2c-2bf8-4607-9d17-b6cf3bc3b93c/55737225424.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/64532165249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9694b8e7-74fd-428a-a9d5-a6d31aef092e/rasub.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/what_did_vladimir_lenin_accomplish.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/roforumupedetafomukavasag.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/gatumiforizigokijivotede.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/mirutidigutezo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4B3 5580 bytes
SHA-256: 1fbd1fab7ed8f62b21cc8869db5caf4e57e17dc69b26a47ae03f8619b32ef5f3
font_01_sfnt_off0001b78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B78A 11568 bytes
SHA-256: c25a5dd465e22e3fe1bed28b555ad17f2a4ed9ac8665a46353474c648836c018
font_02_sfnt_off0001deed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEED 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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