Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5519caed574ea7…

MALICIOUS

PDF

78.3 KB Created: 2021-05-26 18:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7ee6ba19c7c25a3a636ed4cc7f7a41e SHA-1: bb0a89b7558c936c2511f483ec9e2063693a1246 SHA-256: 9d5519caed574ea7e85c7e41052f9907c7df61fab4672c9599292d4309354561
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to educational content, which is a common tactic for phishing campaigns.

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
  • 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://maypoin.ru/strik?utm_term=divisiones+de+2+cifras+4+primaria
    • https://cdn-cms.f-static.net/uploads/4505771/normal_60605ab7b3eb8.pdf
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/pamifinogu.pdf
    • https://cdn-cms.f-static.net/uploads/4386828/normal_604310a7f367b.pdf
    • https://static.s123-cdn-static.com/uploads/4421329/normal_5fce3d13c00cd.pdf
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/tasowexaru.pdf
    • https://static.s123-cdn-static.com/uploads/4367952/normal_60023981264c4.pdf
    • https://cdn-cms.f-static.net/uploads/4450037/normal_605f991373221.pdf
    • https://nunigagajil.weebly.com/uploads/1/3/4/7/134751499/vimuguji-sujefipori-defisenapedik.pdf
    • https://cdn-cms.f-static.net/uploads/4491934/normal_6054b7ac82312.pdf
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fee0d6ec360f.pdf
    • https://cdn-cms.f-static.net/uploads/4501214/normal_5fe7725c37018.pdf
    • https://static.s123-cdn-static.com/uploads/4388842/normal_5ffa345ca6aef.pdf
    • https://static.s123-cdn-static.com/uploads/4495399/normal_5fefa988d6343.pdf
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5fca5e6aaa8a0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4ee855b7-3e2d-4e3a-8f7a-4bc86b8bef4a/79213301465.pdf
    • https://uploads.strikinglycdn.com/files/de237002-ec89-456f-8ac7-f286196bac80/the_twilight_saga_new_moon_soundtrack_download_in_hindi_filmyzilla.pdf
    • https://uploads.strikinglycdn.com/files/d98b115b-db70-4f49-8d32-2113488d6f41/what_colors_did_roman_soldiers_wear.pdf
    • https://uploads.strikinglycdn.com/files/793fc7af-b5f1-40af-b321-1b0e37b5a841/82486355014.pdf
    • https://uploads.strikinglycdn.com/files/7a296237-9152-40e7-9764-3bfe40e06e6f/54852044679.pdf
    • https://uploads.strikinglycdn.com/files/2d9c37ab-7781-441b-854a-fef232387ccc/43231655897.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f088.bin
6578e409260e5460ce160016f6b711c8630d6eaa7637743c8d12c40b0201e812		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 5548 bytes
font_01_sfnt_off00010370.bin
dde12accb8db288f0bd3b4f487516178d89e6c3f15dbeff255398a5b3bf65ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10370 11852 bytes

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