Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94c61eb6e2601b1…

MALICIOUS

PDF

65.3 KB Created: 2021-01-09 12:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 736aa4f7463b7d12c88bc3ee316a5df4 SHA-1: ea1728a4571c936ee782b8b7f1665b443ba7198b SHA-256: a94c61eb6e2601b1f04313c4398ab00baad428e0e6b959576c255c61d165de9f
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/123?utm_term=rivals+2020+recruiting+rankings+basketball'. This URL is likely used to lure victims into clicking on it, potentially leading to further malware downloads or phishing pages. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=rivals+2020+recruiting+rankings+basketball In PDF document text
    • https://cdn.sqhk.co/dewobube/B0Ogcbu/egg_wars_map_download_ps4.pdfIn PDF document text
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/vamijowonu.pdfIn PDF document text
    • https://cdn.sqhk.co/xalazuwumi/miahhF3/17848309618.pdfIn PDF document text
    • https://cdn.sqhk.co/tumozaraf/jdXgf1n/74306604868.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/75cfd0e8757.pdfIn PDF document text
    • https://zejibepubik.weebly.com/uploads/1/3/1/0/131070590/4482449.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/2602c3a8ecf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465402/normal_5fdeedda763e1.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/metakibeme/43275102272.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/bilowe.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_off0000c364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC364 5512 bytes
SHA-256: 91ffe0e74066ab36f3e4de165bbf6bee1ab6970d39c429ca36d1ed7e00bc8387
font_01_sfnt_off0000d63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63B 10136 bytes
SHA-256: cce41cdce3fefb054344df74e40ec4ad9f5a96c58c7a4ce783468f0936aa25aa