Malicious PDF — malware analysis report

Static analysis result for SHA-256 529a97958952a2e8…

MALICIOUS

PDF

76.8 KB Created: 2021-01-16 10:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 15500509daa2592a37ac2809ad86b52c SHA-1: 91a46c233f6fa5cc0b1ce924b2067052318edccc SHA-256: 529a97958952a2e84a80383ce177c9508e67dff6ca827604b799cd6ee0d2db40
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that redirects to a known malicious domain, likely intended to phish for credentials or deliver a secondary payload. The document body, though partially corrupted, suggests a lure related to 'design pattern' interview questions.

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://ggtraff.ru/aws?utm_term=design+pattern+c+interview+questions+and+answers In PDF document text
    • https://kosigejobawazi.weebly.com/uploads/1/3/4/3/134315380/9889238.pdfIn PDF document text
    • https://sugasukeni.weebly.com/uploads/1/3/4/8/134878852/zifepigepi.pdfIn PDF document text
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/ropuzufemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485157/normal_5fd32296e2f3e.pdfIn PDF document text
    • https://site-1172732.mozfiles.com/files/1172732/dolemukivonitipoxulegi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_5fb5dbdd22da8.pdfIn PDF document text
    • https://site-1176273.mozfiles.com/files/1176273/city_of_stars_classical_guitar_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389581/normal_5f93176d76211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f912c815293a.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/fevobelijogal/wood_bed_frame_platform_queen.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/4955968012.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/50157574147.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_off0000f0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CC 5488 bytes
SHA-256: 76fed8f6618235492ad212b9aa2beacd8ec05457c696b4ceef6a07cdf13c5b43
font_01_sfnt_off00010398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10398 10256 bytes
SHA-256: f667ba608c7e687f015cb34509beb025423b75e1644d5a1463ba7454f409480e

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