Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9978e6064f4c159…

MALICIOUS

PDF

83.6 KB Created: 2021-03-17 08:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce5969e9ba2083be4da652fd488d3edb SHA-1: e4b79c88cd5c7e7d9a1d1e63961a1404beec46d2 SHA-256: d9978e6064f4c159f0e84a88cabc17fa8707782970571241d29f624f806fe01c
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that mimic search results for educational materials, likely as a lure to download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=learn+python+3+the+hard+way+pdf+download
    • http://sidufapas.mywebcommunity.org/bsc_2nd_year_inorganic_chemistry_notes_download.pdf
    • https://static.s123-cdn-static.com/uploads/4459624/normal_5fe2802f9d73c.pdf
    • http://raxajifiwovoj.iblogger.org/razutozesetabomodivagunap.pdf
    • http://dolinunuridaku.iblogger.org/806060247.pdf
    • https://buniburus.weebly.com/uploads/1/3/1/6/131637527/poranugogamovuvu.pdf
    • https://static.s123-cdn-static.com/uploads/4480149/normal_5ff260b6bf150.pdf
    • https://rekasefuwe.weebly.com/uploads/1/3/0/9/130969231/685a6cba05f80f5.pdf
    • https://static.s123-cdn-static.com/uploads/4406482/normal_5fce85fbce30a.pdf
    • https://cdn-cms.f-static.net/uploads/4480745/normal_604e137c47340.pdf
    • http://lavokuladuranab.22web.org/brt_creti_nete_evirme_forml.pdf
    • https://puwedogomep.weebly.com/uploads/1/3/1/3/131382223/3634758.pdf
    • https://pusudojajepi.weebly.com/uploads/1/3/5/3/135322366/gopidefarewumoxalo.pdf
    • https://cdn-cms.f-static.net/uploads/4414169/normal_6049263db76bd.pdf
    • https://cdn-cms.f-static.net/uploads/4423148/normal_6018ce534a4d2.pdf
    • https://cdn-cms.f-static.net/uploads/4475194/normal_603605c9eb90f.pdf
    • http://zodatowafe.getenjoyment.net/helping_and_linking_verbs.pdf
    • https://static.s123-cdn-static.com/uploads/4374022/normal_5fee327ce8205.pdf
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5feb3bd0308e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lajirobodogew.epizy.com/84259428961.pdf
    • http://gujimosodaza.myartsonline.com/how_to_maintain_my_proform_treadmill.pdf
    • http://renoxefi.epizy.com/romato.pdf
    • http://teporududa.rf.gd/35406571526.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_off000107e9.bin
13a94144a1bc61eafa6d5dfb4fc94c1d7ae23b18b87161eac6e0441095995b50
pdf-font-stream PDF embedded font (sfnt) at offset 0x107E9 5252 bytes
font_01_sfnt_off000119e2.bin
da88ca2ce4b8a366d562203c8683b3706ae550513f318adc1a52cfb10fe4393d
pdf-font-stream PDF embedded font (sfnt) at offset 0x119E2 11632 bytes