Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb53f01b6019484…

MALICIOUS

PDF

61.0 KB Created: 2020-12-10 21:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0dd21035353fcb5465c59f6b125b3900 SHA-1: e8fa3c3b8af088121717910a76c5347784d6569b SHA-256: ebb53f01b6019484bf399f0a7cfa00ea15cb48f1fcdc9d02ec18565e81c39aa8
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=dreamstation+bipap+avaps+clinical+manual'. This URL is likely used to phish for sensitive information, as indicated by the 'utm_term' parameter suggesting a lure. The ML classifier and ClamAV detection further confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=dreamstation+bipap+avaps+clinical+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_5fa0e0469944c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_5fb74b812db2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480580/normal_5fccb7c1731dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/96960814464.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/lozarojakewazisa.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/minecraft_overworld_to_nether_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/calendario_napoli_2019_20.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/xiwidixalesebola.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/heart_piece_guide_minish_cap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2443053a-48d9-41ba-aabc-4975751cd0d4/dungeons_and_dragons_artifacts.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/varokemijubezewudonam.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_off0000b449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB449 5276 bytes
SHA-256: 30ea4a9efa5c8cf0606100f4216da4d093b669d4d4c5b799af6e6b5ec7677dec
font_01_sfnt_off0000c62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62D 9760 bytes
SHA-256: 457546348ed9a07d4b12c96e374b94cd9a4fd851d35011276c31f406de38b685