Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecce4acacad82d12…

MALICIOUS

PDF

77.7 KB Created: 2020-12-18 06:58:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8068856fcb87fdeccbf85501233a9f05 SHA-1: 790c0836233c20c3a3bb52272665e39f24f86c10 SHA-256: ecce4acacad82d12a294d39c6a351bba3f8e306a9c056b243b0312b800cd6fd7
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded content, though heavily obfuscated, suggests a lure related to a product manual. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

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://ggtraff.ru/strik?utm_term=bissell+-+proheat+2x+revolution+pet+upright+deep+cleaner+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459914/normal_5fb97dc0bcddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5f8cfc63ef2b3.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://static1.squarespace.com/static/5fc0e44e92c50b1a1e7784dc/t/5fcc0a88d235d37878b271b9/1607207561576/4716234715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b87c30-0246-4c4c-870d-9cf1ff37d647/zebunexega.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe22d82dd96f5918b7786c/1606296280959/carl_schurz_high_school_yearbooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a195d7a2-c09f-4425-beeb-527927323854/nagak.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc34462ab79f442f238dc9b/t/5fcf42fe8b174454e99b9b51/1607418622985/xizuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8ae9e3-5eaa-4d6e-8cc9-a7caae4eb128/wreck_it_ralph_2_full_movie_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a190c524-5437-425b-9439-ec425ee9703f/mebejexopegusuni.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ac7a40f1034a5cae5b81/t/5fcbe120a51c5a1401b682f1/1607196961876/nostalgia_critic_intro_meme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c8f927-5472-4dc3-9c96-be72a345b720/elsa_coloring_pages_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58d7ddf132613bbdd2249/t/5fc7981f09f4d56e8f8a07d8/1606916128988/speed_boats_for_sale_in_maryland.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_off0000e0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B5 5708 bytes
SHA-256: 75fdd722459db4b1e621a286e02018789f8c0c0df6c00cf38724fcb9abb2aa51
font_01_sfnt_off0000f3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 10936 bytes
SHA-256: d3673ff323e2c9f24ed75cfbf60ba1f6f4a89438a19811c5e2215b89c9944657
font_02_sfnt_off00011978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11978 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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