Malicious PDF — malware analysis report

Static analysis result for SHA-256 a27cbf9ef5c5888a…

MALICIOUS

PDF

78.3 KB Created: 2021-03-29 01:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83e87276d9a067f686ac2bce9c1d567e SHA-1: 7a71a69ac2a5ba895c41d88611fef5adb861b0ba SHA-256: a27cbf9ef5c5888a36a618ce1ca7e764bf2e71be46a7c1d7df0f17a7b278843e
96 Risk Score

Malware Insights

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

The file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that likely lead to the download of further malicious content, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the presence of external URIs suggests an attempt to execute code or download payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/123?utm_term=animated+knots+by+grog+9.+1+apk
    • http://foselosen.sportsontheweb.net/sejarah_perkembangan_agama_islam_di_indonesia.pdf
    • http://xutexukoxobofi.mywebcommunity.org/legal_and_ethical_issues_in_nursing.pdf
    • https://cdn.sqhk.co/pasivuzuke/cifhbjd/98790242387.pdf
    • http://dexiserabasavo.mygamesonline.org/aisi_4140_properties.pdf
    • http://sopesukenapad.scienceontheweb.net/business_plan_for_briquette_making.pdf
    • https://cdn.sqhk.co/rilowikapaz/vb52iif/mark_twain_hammer_nail_quote.pdf
    • http://fuxisileza.mywebcommunity.org/14419674144.pdf
    • https://static.s123-cdn-static.com/uploads/4410015/normal_5ff4a8d359011.pdf
    • https://cdn.sqhk.co/jekunesoru/DEE75gh/information_noun_collocations.pdf
    • https://cdn.sqhk.co/dasofuduveje/bBidugc/jibemutafegodovexufegimu.pdf
    • http://giwitijudaleka.mygamesonline.org/bikini_body_burn_12_week_guide.pdf
    • https://static.s123-cdn-static.com/uploads/4417329/normal_600148d5e2b08.pdf
    • http://diluzadumavotux.getenjoyment.net/58152529435.pdf
    • https://cdn-cms.f-static.net/uploads/4392470/normal_6031319a0f6a0.pdf
    • https://cdn.sqhk.co/kusamika/aLZgexH/98888121526.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_00bd8e2f2c2d4612b8b1ff600b318c1f.pdf?index=true
    • https://s3.amazonaws.com/vukusa/foliz.pdf
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_8a4c7b41eb234a56a96b40643bb9f2f8.pdf?index=true
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_43236371ffae4f2884a51a47dbfdd739.pdf?index=true
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_dca032f130c64fa9b639e21f03f61b8d.pdf?index=true
    • https://81d89a68-18ac-4cf1-ad00-ddd5d2f7da41.filesusr.com/ugd/ed58ef_04dbb0a1fa8040208d971a60357d0985.pdf?index=true
    • https://s3.amazonaws.com/baxekojojexusol/netflix_s_on_plane.pdf
    • https://s3.amazonaws.com/kuxegu/61541574011.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_off0000ef60.bin
c0666520c092fc32075b4dce1f9b2a09a08c285a236c9f30bbf18f3fdd7d4028		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF60 5780 bytes
font_01_sfnt_off00010306.bin
9400d064141bd1a7d1e862b2f6467fc4539fa2ff7c685474075a3f0f1812b277		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10306 11848 bytes

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