Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06847edb861abe8…

MALICIOUS

PDF

81.2 KB Created: 2021-03-03 02:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ab470f9b18a9ce7def5a13b900601d07 SHA-1: d1f5358b70104f5c6ff4f61726be97c197028275 SHA-256: a06847edb861abe879cadfea8287b543546c28358160946ec10ba923be9c2aad
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=given+that+f%2528x%2529+%253D+2x+%252B+5+and+g%2528x%2529+%253D+x+%25E2%2588%2592+7+solve+for+f%2528g%2528x%2529%2529+when+x+%253D+%25E2%2588%25923.+%25281+point%2529 PDF link annotation
    • https://cdn.sqhk.co/ligumorik/bhdiaLC/motogp_news_today.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_602a7d12a0d2e.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/HhamIlw/lasogexakuxegijetunon.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/aZSeria/pawaxiburakimafarudil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495531/normal_5ffe501e04181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469849/normal_601dd7c38e678.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/my_iphone_says_my_icloud_storage_is_almost_full.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/jurobepofowa.pdfIn PDF document text
    • http://1xbet-registrat.site/the_blood_of_kings_dynasty_and_ritual_in_maya_artrothj.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/hbuijad/fewukaredune.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/42852017718.pdfIn PDF document text
    • https://kagesurofuzesik.weebly.com/uploads/1/3/5/3/135303772/c9f82e51707e.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/kasobo.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://noxikemudenuma.epizy.com/wukowevoko.pdfIn PDF document text
    • http://mofebuxigonewo.epizy.com/75975489930.pdfIn PDF document text
    • http://zugosixefi.epizy.com/38125529047.pdfIn PDF document text
    • http://disoluje.myartsonline.com/value_investing_books_quora.pdfIn PDF document text
    • http://zepedijuva.epizy.com/apple_airport_time_capsule_2tb_best_price.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22B 6160 bytes
SHA-256: 62aa3fcc27ccab85a7f171f49d9035fcbaf22445a5519afda20bbe60546fbdd3
font_01_sfnt_off0000e76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76A 12572 bytes
SHA-256: ae29e920a1532b0bea040e693fb1b9b2388c364e2793030a07c1d7301fdecbdc
font_02_sfnt_off00011008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11008 16080 bytes
SHA-256: aba6d7228e0fcc42341ee09250d9598a413f48202077e5963e65f524ed209447
font_03_sfnt_off000124b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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