Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58e3d34ce38e964…

MALICIOUS

PDF

64.8 KB Created: 2020-11-11 20:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 73148207e0c9c3b846c444245df0d0f0 SHA-1: d18d7e6d071dccae594983d48153d5c68f5510fa SHA-256: c58e3d34ce38e9644641fb323dfa996c47c279b8248a16dc4a4c37f6edbca182
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites, including a known malicious redirector. The document body text, though heavily obfuscated, contains keywords like "boot manager apk cracked" suggesting a lure for potentially malicious software. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/aws?utm_term=boot+manager+apk+cracked In PDF document text
    • https://rogenogenitel.weebly.com/uploads/1/3/4/3/134316557/dumanosapiraveni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5f8a42efbeef0.pdfIn PDF document text
    • https://xuvaguwofivopi.weebly.com/uploads/1/3/4/4/134463587/lofolikesagenedab.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/nilafafakem/tawafukat.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/how_to_cure_asthma_naturally_permanently.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/jolisipuzekemizuras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d00eddf-f807-407a-be58-cb57a21730ea/zarexisuberep.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/3095721693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51b1cdf-f141-4b05-93f5-f495c37f6fb5/pulefikuzoj.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/naruto_posters_for_room.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_off0000bef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF6 5296 bytes
SHA-256: eb2fe87900b22183b496faeff98b9a6d2e1f735b20b38b419d3dc0a474f560f2
font_01_sfnt_off0000d0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E5 11176 bytes
SHA-256: 03099004c154f07711c5567a4e841205a187cd217e93d683838ad3b233d39db1

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