Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5cb0676f4e6ac04…

MALICIOUS

PDF

69.8 KB Created: 2020-12-02 08:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 92d7ef804e4e0f2af735da86184a6bd5 SHA-1: 1fd478245c35b001106155f953479c5d8cd0c69d SHA-256: b5cb0676f4e6ac04deab7b16d02dc39b1a0a3e343f851ecaba538824369d0c6c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=hotpoint+electric+stove+not+heating+up In PDF document text
    • https://cdn-cms.f-static.net/uploads/4457592/normal_5fb2bc900d822.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/5fbfdc47a13a450babee0d2c/t/5fc21338fa04221c71670418/1606554429146/pitefo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e01f2cf09257bd6be9c2/t/5fc40bb008845d092407caa8/1606683568840/miwejib.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/loperosekiwokap.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00c29085bf90c0ef85582/t/5fc13be92dd96f59181c5178/1606499307826/cpm_cc3_answer_key_chapter_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aeb487a-aaab-4676-9fbd-bc44dc7a2b9a/26561036347.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27a90c14dfd36fefb8bc0/t/5fc3d08eeaf37e3b6410cb3c/1606668436883/projectile_motion_problems_worksheet_with_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13224643-176f-4a94-ab66-6c55c6f47c8e/damien_cartron_biographie.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/past_simple_irregular_verbs_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5677ef9866f3fd2f21712/t/5fc664e3f8cdb769c6beaf3a/1606837476037/xebalamubefolaxebofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/060a9eb8-e77b-4b1e-ae1f-5de712979e90/bubex.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_off0000c5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F4 5100 bytes
SHA-256: 531b9e3e495395e778bcd238c5f7d632742dfc8229917e3d039fcaee315adc3e
font_01_sfnt_off0000d742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 10884 bytes
SHA-256: ab1e39ba9732eaba1dab58a997b51e4d154ea1f06182123953493b07a01c2137
font_02_sfnt_off0000fc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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