Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b58d69d63761b9…

MALICIOUS

PDF

79.7 KB Created: 2021-01-09 23:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d9f4d43844d7b425034e2281cfffa0a0 SHA-1: 657948adfec4fb84155c206f7f2744e69056363c SHA-256: d0b58d69d63761b9ac03d350b0503fa5db7c6606e68551f70f808e8b5e88f6ce
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by a machine learning classifier and ClamAV, specifically flagged as 'Pdf.Phishing.Trojan'. The presence of a 'download button' heuristic and an external URI pointing to 'traffking.ru' suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct textual lure is discernible.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/aws?utm_term=pstet+2019+syllabus+pdf PDF link annotation
    • https://site-1178385.mozfiles.com/files/1178385/pizekevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416664/normal_5fd17d2abfc8a.pdfIn PDF document text
    • https://site-1172428.mozfiles.com/files/1172428/cnc_simulator_free_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5fd81759e810b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417145/normal_5f97c93382a1b.pdfIn PDF document text
    • https://site-1168045.mozfiles.com/files/1168045/lobev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_5fdb7a3912896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459780/normal_5fd235be02fe7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493282/normal_5fdf9c8b40583.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383573/normal_5fe5c36420805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379500/normal_5fdd970f197c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376599/normal_5ff95882159a2.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/kalufizefem/vuwuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/50156816851.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/23196468534.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 5664 bytes
SHA-256: b0d72aa8b6788259c8c92d903476154e7163e9acc420c5f0e24eed3f0abe2b97
font_01_sfnt_off00010e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E70 10492 bytes
SHA-256: 78fac181872500cf61b854a4b472ebbc1bd70e41ae3b95183d8107e44dc7e649

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