Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d870df07e10364c…

MALICIOUS

PDF

55.2 KB Created: 2020-12-17 18:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f276e7e9d67856e7a31ee79901477718 SHA-1: 57a6e1193a33ed76155f52bb0b373bcaf60cc055 SHA-256: 4d870df07e10364cb9e241e9cad732a169e8405a5eaf50683adbed07ca0cd546
116 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to hide a clickable link. The embedded URL, https://trafftec.ru/strik?utm_term=8+bit+drummer+twitter, is the primary indicator of malicious intent, likely serving as a redirect to a phishing or malware distribution site. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 55 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=8+bit+drummer+twitter PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/free_bootstrap_template_landing_page.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc971c8c741314319700/t/5fc148644f983757200ed49a/1606502500611/jojigofat.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/possessivartikel_bung.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/free_online_printable_label_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/aix_rpm._rte.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/bastille_those_nights.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc531fa405d5340f345b286/t/5fd1b694ce71ee580fa99d3d/1607579284999/wifodimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fafc94e6-3610-45a9-9f22-518cd6ccd671/wintercroft_masks_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da0ed375-4cd3-4c89-b3fe-7d1d1ff0acbe/kegisezozisepiwobebunu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd008c14dfd36feeb1b6e/t/5fc1a63d1972c46e3cdcb86d/1606526525678/34098467392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be2face-38b7-46a2-b4ab-9d711ba63d2a/xukebixozadakenego.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc365b22e34347c70542066/t/5fc899d6ec83506b047e58e3/1606982104880/sikutofe.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_off0000a67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA67D 4880 bytes
SHA-256: 7469e636766d439e54a239ac7caef4890528e65f7121937fa4daae3838899eee
font_01_sfnt_off0000b708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB708 7408 bytes
SHA-256: c9cdfea2c1b6590755d353137ca2aec237a48037750c19fa8dfea4e0b249ef52

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