Malicious PDF — malware analysis report

Static analysis result for SHA-256 3163f1c9e04d845e…

MALICIOUS

PDF

70.5 KB Created: 2021-02-18 23:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1e968a00043facc0f3edf14ff1304c5c SHA-1: d176d1a7ad9dc052e11c6385253a5d2577c221bd SHA-256: 3163f1c9e04d845ee2db0a61b38c32e72b7330bef199f06e5534df068ab2575b
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the presence of malicious links and the PDF structure suggest an attempt to exploit users by directing them to harmful 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://crophysi.ru/strik?utm_term=emotional+regulation+skills+definition In PDF document text
    • http://snatural.space/the_vampire_diaries_novel_series_author45ze1.pdfIn PDF document text
    • http://heleogose.online/chromedriver_selenium_filebbigw.pdfIn PDF document text
    • http://mpvideo.org/26741712844xji59.pdfIn PDF document text
    • http://perevod-card2card24.site/roommate_or_roommate7rajl.pdfIn PDF document text
    • http://trysalon.xyz/6876345797920y9h.pdfIn PDF document text
    • http://beliyden.xyz/11601831635cqty9.pdfIn PDF document text
    • http://milanomoda-italy.website/38015802225morpr.pdfIn PDF document text
    • http://50offshop.info/99290417509ssbk4.pdfIn PDF document text
    • http://lishop.site/rizoredokjn31.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/90150607230nksy6.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/wutogugej/wafobezajakowavodavom.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/93760777638.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/leon_county_booking_report_november_3_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/terraform_hcl_syntax.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/1920396092.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/lozexelipulotufubesowip.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/97403873295.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/lufuturemogulokuz.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_off0000d64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64F 5248 bytes
SHA-256: eb4f12121a2a280bcdf606e9ff0044d52e23f849697af9eb39be3b01928f1834
font_01_sfnt_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 10608 bytes
SHA-256: 5c19ba0b78bb502bdc941ed37ed19d0f87e6d288c768b87669fcf5c02926509a

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