Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb00bb26cd0e5f4…

MALICIOUS

PDF

87.1 KB Created: 2021-04-03 10:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ff7369482c183a5ee29b56a53baa173f SHA-1: 11466649db66e243c9d648ced0f61abc6cdb065c SHA-256: ffb00bb26cd0e5f47900f66630f16d2658a4dacc7a90752c48578afbba2cc6c7
186 Risk Score

Malware Insights

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

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 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=mtg+arena+draft+tier+list+m20 PDF link annotation
    • http://tubipegutadob.iblogger.org/68439514586.pdfIn PDF document text
    • http://somubuzesixuwun.getenjoyment.net/80754066527.pdfIn PDF document text
    • https://rodinesupogoj.weebly.com/uploads/1/3/1/3/131384539/junowotigomowip-porojub-nudovifabaxow-jasiwij.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/U6sibia/raxuwi.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/duriwugejuvigome.pdfIn PDF document text
    • http://gazorowegesejix.22web.org/sahih_bukhari_malayalam.pdfIn PDF document text
    • https://cdn.sqhk.co/dilobowuz/kZr8fhg/zidigimabu.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/iBibXia/msp_2_online_spelen.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/wgdilja/golozisenutotow.pdfIn PDF document text
    • https://kejedavozeve.weebly.com/uploads/1/3/1/4/131483662/0cbaeca153.pdfIn PDF document text
    • https://daxivikulogator.weebly.com/uploads/1/3/4/3/134308382/366505.pdfIn PDF document text
    • https://cdn.sqhk.co/bixevemaxi/ie4hrgj/82620551410.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/vcWiaij/nasa_spacecraft_mars_atmosphere.pdfIn PDF document text
    • https://cdn.sqhk.co/nodezaneripe/evV9EQQ/24494313521.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/0689db76cf.pdfIn PDF document text
    • https://lijotabele.weebly.com/uploads/1/3/4/0/134016876/sixepurodogika.pdfIn PDF document text
    • http://fakitumomida.iblogger.org/wabag.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
    • http://datonojafasaxup.rf.gd/.pdfIn PDF document text
    • http://vasugam.rf.gd/30081886658.pdfIn PDF document text
    • http://zaputizovirifo.rf.gd/long_john_silver_coupons_printable.pdfIn PDF document text
    • http://xasonivuk.epizy.com/cemetery_dance_magazine.pdfIn PDF document text
    • http://getetir.epizy.com/nopelaluvakodagujoxarev.pdfIn PDF document text
    • http://xegorifulenojo.rf.gd/download_kamus_bahasa_sunda_lengkap.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_off00010a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3B 5184 bytes
SHA-256: a5084c51118c837efc881167661cc4c93d03d6618b0cd63b99f5c79b1c4a32a6
font_01_sfnt_off00011bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC2 10816 bytes
SHA-256: b657f4a5c43da06e72ff1f0f8290b7377e6e1be0c98e274a268ec19aac4f9eb5
font_02_sfnt_off000140c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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