Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced0280457991ece…

MALICIOUS

PDF

72.0 KB Created: 2021-02-15 23:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2061376fdbe5bdc1c9fea28f997d9666 SHA-1: 0445bfc14737c6a40a8c7b98ce338fed6389e3a0 SHA-256: ced0280457991eced473c2976fe3680d460f552752d2d09686270ac9acccbc34
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs and the document body's reference to 'netgear fvs318g hardware reset' suggest a lure to trick users into visiting potentially malicious sites for technical support or phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=netgear%20fvs318g%20hardware%20reset PDF link annotation
    • https://rukatopuwor.weebly.com/uploads/1/3/1/1/131164291/6af6f0488c3c5.pdfIn PDF document text
    • http://jumpfs.space/lodosaxafeubegi.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/ugchihi/inside_out_2_release_date_2020_uk.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/tuvirolopilikabak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493569/normal_60073c83e4db7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417980/normal_5fd8e9509098e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_5fc96bf5da372.pdfIn PDF document text
    • http://gk-kuban.ru/ranepekavamon99fiz.pdfIn PDF document text
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/dutunaruvufenodox.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/Z6jdgib/nokusak.pdfIn PDF document text
    • https://witabavuwimob.weebly.com/uploads/1/3/4/3/134339013/rinafugo.pdfIn PDF document text
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/jokixusa.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/54jjZhg/perfect_piano_notes_telugu_songs.pdfIn PDF document text
    • https://romubavopu.weebly.com/uploads/1/3/4/8/134884942/02731401a9.pdfIn PDF document text
    • https://cdn.sqhk.co/kezagajasiw/cibhiib/sojumawefekejusuz.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/5zrnjjj/i_love_crosswords_3_level_20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485823/normal_5fef472051dbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC64 5668 bytes
SHA-256: 8d44f21c2cd3661f7a94c5c281c2b0fab36f8a21636fc74cbf0bc2c523c6e9ff
font_01_sfnt_off0000efce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 10240 bytes
SHA-256: 1615c487da9746fc27af49881170b81703b76ae7db1a86892dbe73afd79ba231

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