Malicious PDF — malware analysis report

Static analysis result for SHA-256 125dfa5503abc47b…

MALICIOUS

PDF

65.6 KB Created: 2021-02-20 03:24:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 90a5b8db7858ab9d2a6c99eb531a883d SHA-1: 61a864f8ac441d66fea0828a8d40b9ae1428bda5 SHA-256: 125dfa5503abc47bc0cd4deaf0b77d495f52e5c16b68065aa569ecd8a5d9a05c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to search results, suggesting a lure. The presence of multiple embedded URLs further supports the malicious intent, likely to redirect the user to a compromised site or download further malicious content.

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://yafferge.ru/strik?utm_term=river+flows+in+you+guitar+tab+fingerstyle In PDF document text
    • http://oneitshop.info/dekivoxawa9xe1c.pdfIn PDF document text
    • http://pomulagija.iblogger.org/vamotifaxuxudumiva.pdfIn PDF document text
    • http://senenetikoxikom.22web.org/duck_hunting_report_texas_coast.pdfIn PDF document text
    • http://tibetterrier.ru/wuparixurotojuq9xke.pdfIn PDF document text
    • https://vutavevivusupe.weebly.com/uploads/1/3/0/7/130776898/judawuziluratoka.pdfIn PDF document text
    • https://sovanomi.weebly.com/uploads/1/3/5/3/135337195/nubosuletebet.pdfIn PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/1698496.pdfIn PDF document text
    • http://fefogumok.22web.org/64739610379.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417662/normal_5fcaedcf481b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486982/normal_6018dbb37b4c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370280/normal_5ffa1b793c3be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://peduzolojuloji.epizy.com/bopovaronabupodebuv.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/10620920313.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/madudikegekozovisedax.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/networks_chapter_13_test_form_a.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/arnold_song_whatsapp_status.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/72059870309.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_off0000c478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC478 5336 bytes
SHA-256: 0268c4262870919cbd04870476ee509b1df30dba0a3781fd98e0a7896447bfc7
font_01_sfnt_off0000d6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D4 10160 bytes
SHA-256: 8358868d82002b9ddd7b7d385be937e07f9eeb27ea653bd0e1d95c3af1f5c443

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