Malicious PDF — malware analysis report

Static analysis result for SHA-256 67678d204253279f…

MALICIOUS

PDF

76.7 KB Created: 2021-02-17 19:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c8bf24d8b0606f4a521616f9eccaf517 SHA-1: 6905038c11829927b7c99108362fd625c7a18c84 SHA-256: 67678d204253279fbd1c7635a4413aa543692f82a3d5f039eb549a74947f85ee
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 'crophysi.ru'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be related to the URL's query parameter, suggesting a phishing or scam lure.

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://crophysi.ru/strik?utm_term=1+de+novembro+feriado+em+que+paises In PDF document text
    • https://static.s123-cdn-static.com/uploads/4411701/normal_5ffcfedb2f2ed.pdfIn PDF document text
    • https://dosasefezopalan.weebly.com/uploads/1/3/1/3/131398547/sasar-zukulazitudor.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/4094514.pdfIn PDF document text
    • https://cdn.sqhk.co/lukisebeka/ZhriigV/ibis_paint_x_tutorial_outline.pdfIn PDF document text
    • http://alex-travel.moscow/76756100445lbi6g.pdfIn PDF document text
    • http://maska-respirator.shop/8818033841dfw9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_602cf83bc74af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_5fda597eb47a2.pdfIn PDF document text
    • https://wivexisi.weebly.com/uploads/1/3/1/0/131070498/84e6b38c8f7b4.pdfIn PDF document text
    • https://ziruxirunilexa.weebly.com/uploads/1/3/0/7/130775543/5585469.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453885/normal_6001dd53e9b47.pdfIn PDF document text
    • http://mignonette.space/blender_2._8_manual_book8ro3s.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/zuxime/julatawadawogiwago.pdfIn PDF document text
    • http://gagelenobom.epizy.com/androidx_cardview_import.pdfIn PDF document text
    • http://zukizibukuxupir.epizy.com/zalosuvuxuwitekivovu.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/directors_remuneration_report_example.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/62699160796.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/automotive_mechanics_books.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/koselo.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_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 5440 bytes
SHA-256: 3e892295a9221694c6ad8092ea920ec2ff1b8a24a88325645e93f9592add65b1
font_01_sfnt_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 13380 bytes
SHA-256: 84074c3e9c9efa13dd5c7c2e2c7f0580617a8f0f76d759d4c3fbdb14d23fcdfb

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