Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d2a56559634cf9…

MALICIOUS

PDF

60.7 KB Created: 2021-02-20 23:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21357b0291d475d1878ad7d67aaed910 SHA-1: 75292492f9e8cae5989d007f8fd00784f976428c SHA-256: e3d2a56559634cf93b339ae5f9d36c13604f77016250be78bb32739196aa7b63
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious URL, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to a 'training guide'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=maplelegends+training+guide
    • https://sagopitura.weebly.com/uploads/1/3/1/1/131164573/kulirofa.pdf
    • http://ligumiju.iblogger.org/aapka_picture_video.pdf
    • https://cdn-cms.f-static.net/uploads/4375204/normal_60116e30db27d.pdf
    • http://zonamumajotodot.iblogger.org/50596569897.pdf
    • https://cdn-cms.f-static.net/uploads/4366381/normal_602c286009338.pdf
    • https://static.s123-cdn-static.com/uploads/4410989/normal_5fdfd5676f894.pdf
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5fff455f29de6.pdf
    • https://fexupewoxi.weebly.com/uploads/1/3/4/6/134619994/082acf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://baxamudixilado.rf.gd/dilagufemotebaporez.pdf
    • https://s3.amazonaws.com/bisegilupuf/90597980318.pdf
    • http://kafudunafow.epizy.com/arabic_vocabulary_words_english.pdf
    • http://vigopul.epizy.com/galinawubutonaxi.pdf
    • https://s3.amazonaws.com/luworizesupox/43417954136.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_off0000b23f.bin
9ab6f3a55017d755db3474d04b0bf716e3c4753a73a87e8158e7acbe7205793c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB23F 5132 bytes
font_01_sfnt_off0000c3ca.bin
30b54f53c2628126aba7a6603d872dc7a644fb908fbf81225c844d42a953bfc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CA 10060 bytes

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