Malicious PDF — malware analysis report

Static analysis result for SHA-256 093a0adde510b3f7…

MALICIOUS

PDF

82.2 KB Created: 2021-02-25 22:00:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ab18452d39a5cb1b07812e496a41d590 SHA-1: c56234c6301606b88895d69896fed781805a76eb SHA-256: 093a0adde510b3f75b00bd346a2740db11d3064910fef273cbc90ed95e672122
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many of which point to disposable domains and are used in a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to redirect the user to a malicious site, potentially for credential harvesting or malware delivery.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/strik?utm_term=porter+cable+air+compressor+parts+c2002+type+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489844/normal_60164cd0001d0.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/witalanubagagikixebiwej.pdfIn PDF document text
    • https://kozegefiseram.weebly.com/uploads/1/3/1/3/131379202/bulelukuvelidop-levuwofivimeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_601cf74e679c7.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/bose_wave_radio_review.pdfIn PDF document text
    • https://begobaxu.weebly.com/uploads/1/3/5/3/135336669/666757.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5ff6615f9db46.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/onkyo_tx-nr686_reset.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/5564971060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401976/normal_60067fe1e7e32.pdfIn PDF document text
    • https://tofoboloronu.weebly.com/uploads/1/3/1/6/131636632/5981d820bc3173.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387433/normal_5fffb683809ad.pdfIn PDF document text
    • https://pixebekisutajud.weebly.com/uploads/1/3/0/7/130775176/91ebd526418249.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/nowadizifafiritife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dotivaf/remote_jr_developer_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/dancing_line_sheet_music_the_desert.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/sheet_music_ode_to_joy_piano_beginners.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67A 5440 bytes
SHA-256: b0ac6773acfe1be09767a6f21557b37784efabb33119ca64014599bb7e1af838
font_01_sfnt_off000108f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F7 10832 bytes
SHA-256: 6b0770d00f9298d61a280c133747b18ab18b54f9a7e6208914d8cd79a350295f
font_02_sfnt_off00012d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D99 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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