Malicious PDF — malware analysis report

Static analysis result for SHA-256 21943bee3d1262b1…

MALICIOUS

PDF

66.4 KB Created: 2020-12-15 14:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c72e5b0c630e29b66893cd643a11033b SHA-1: 63f37965dcc35d1d3b3b7f10b1b747d89bb80e27 SHA-256: 21943bee3d1262b114e3c20dee253b3dcd663946e6cc4827aebd4da2f6b1dd40
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 'traffking.ru'. 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 compromised 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://traffking.ru/123?utm_term=rogich+middle+school+basketball In 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/5fc12254405d5340f32af944/t/5fc559fa3c02f22b9dbec186/1606769147418/lumej.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66d97df132613bbe366a6/t/5fca66341047645eeb2dd335/1607099957361/free_online_flowchart_maker_open_source.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5811288c99b6d37c67bb2/t/5fcef56457846c5b834a492f/1607398758050/47832505244.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/fizizelir.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/6104493160.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/simon_ielts.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59b71c6229360ecccef93/t/5fd1ecf3ad61ab58318dc038/1607593214142/26497743285.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc585215687f52b6ba07531/t/5fc862b813de6e798159171c/1606967994513/ixl_9th_grade_language_arts_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/7861778409.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/back_button_pressed_in_fragment_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/date_sheet_aiou_ma_education_2019.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_off0000c79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79B 5468 bytes
SHA-256: abc4a13ad17bc8d9be026b553d55ec90e0eda36339a2d8d7068eaecc30b640ec
font_01_sfnt_off0000da16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA16 10240 bytes
SHA-256: e3e98de4479b828c139c57e63c3f6b6bd48e7e436fdb56a832c7e15c04005461

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