Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c26ac9d231a440…

MALICIOUS

PDF

74.1 KB Created: 2021-03-16 06:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e0e7eb70b00df6a67ff113d93084d9f0 SHA-1: 86bc7d9c636bb32e5c742a3443b452d949611842 SHA-256: 39c26ac9d231a44063ae375a41f803ee8d0a380d0e2b4871a84ba3dff97aa6b3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=modern+family+screenplay+pdf PDF link annotation
    • http://copyrighthelp.info/xetasod1dnz.pdfIn PDF document text
    • http://nuwetiveguvo.mypressonline.com/ukulele_chord_progression_chart.pdfIn PDF document text
    • http://rumepado.mypressonline.com/88468203210.pdfIn PDF document text
    • http://brettlockhart.com/meaning_of_the_word_split_second768h3.pdfIn PDF document text
    • http://b0xberry.online/jegoxelewusujosijakukupegs1u3x.pdfIn PDF document text
    • https://kaxejawajafu.weebly.com/uploads/1/3/4/7/134776484/15fdf.pdfIn PDF document text
    • http://goxivomibivufuv.mywebcommunity.org/73060769657.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/2144267414.pdfIn PDF document text
    • http://tojipipawerar.22web.org/fmea_template_excel_aiag.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/motu_patlu_kungfu_warriorrossi.pdfIn PDF document text
    • https://vavozeja.weebly.com/uploads/1/3/5/3/135308761/ratojefuripumol_gidizu.pdfIn PDF document text
    • https://xekotoruwogobib.weebly.com/uploads/1/3/1/6/131606212/10285.pdfIn PDF document text
    • https://gilolubirej.weebly.com/uploads/1/3/4/3/134309297/505684d32cf776.pdfIn PDF document text
    • https://lalusilimedam.weebly.com/uploads/1/3/0/9/130969483/tewuwosanufosux_kezer.pdfIn PDF document text
    • https://kominuxopexazi.weebly.com/uploads/1/3/0/8/130814675/275e6.pdfIn PDF document text
    • https://dowanudamedi.weebly.com/uploads/1/3/1/3/131398164/mazobuxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijesilelupav.epizy.com/nelotiwuvekijevozom.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/64619924278.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/8664863181.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/4120968183.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/febejopaburogotuwosojul.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE593 5408 bytes
SHA-256: ae01bb5ea8e3807f2d2aaa08893e329b762d363fdef0378e5e0679b41c0fecad
font_01_sfnt_off0000f7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FC 10320 bytes
SHA-256: ab4ca4d5f1e7074bdee6e68debad803528b9aa529fa9910afbfbb3226e0710e8

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