Malicious PDF — malware analysis report

Static analysis result for SHA-256 32dfe0512b04c259…

MALICIOUS

PDF

74.9 KB Created: 2021-01-06 03:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 148864e2d9e26716e9341214fefd6d80 SHA-1: 9056860a674d39caaf908cc1672e2c5e03ca833a SHA-256: 32dfe0512b04c259113f63fa39c090dabb18fbf71ca42ec73ac110efd8013b9d
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://gettraff.ru/aws?utm_term=easybib+apa+format+citations'. This URL is likely used to redirect victims to a phishing page or to download a secondary payload. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

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://gettraff.ru/aws?utm_term=easybib+apa+format+citations In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_5fad38909dbf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375086/normal_5fcc2f0267644.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/vjcnnGL/mejebev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379477/normal_5fa24e185ff69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f88f42156ac7.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/hMgiRzX/fox_news_ratings_september_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459036/normal_5fa9338ae9456.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://uploads.strikinglycdn.com/files/ef616d0f-00e2-4f63-a57f-e4ae22917661/34689186177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f2199d-d40c-4289-8836-9396ed508794/live_right_for_your_type.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/california_fetal_death_certificate_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b24d16-6672-4f4e-8fc4-11e18f965ec2/sasuke_x_itachi_manga.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_off0000db9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 5000 bytes
SHA-256: cc286364915a30f767246dfe4a5d331f1f15a161fc8f5f86d5e233590869a9ce
font_01_sfnt_off0000ec76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC76 10672 bytes
SHA-256: 1a3784e4d966755802cfb688f65ffad647803e4d471d524121b56c138da8f7f8
font_02_sfnt_off000110de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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