Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad640cf3f1c8e805…

MALICIOUS

PDF

79.3 KB Created: 2021-03-12 09:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9d52d14c71fa4bf810e2d391d0e2b67e SHA-1: b061d2df634fd5166c6435f616d99356d474679f SHA-256: ad640cf3f1c8e8053c7478f6f096cfbd862c11afee53d2de8c004b550d4237dd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs, including one that directly references 'police report accident', suggests a social engineering lure to drive traffic to malicious sites.

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://seumenha.ru/123?utm_term=police+report+accident PDF link annotation
    • http://busivel.xyz/aplikasi_brainly_uptodownfnjtb.pdfIn PDF document text
    • http://dejamorije.scienceontheweb.net/basic_english_for_computing_teacher_s_book_download.pdfIn PDF document text
    • https://nixifekenebuj.weebly.com/uploads/1/3/0/7/130775280/6019726.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/1994_honda_accord_engine_options_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_600c1f04ef80e.pdfIn PDF document text
    • https://zasiranel.weebly.com/uploads/1/3/4/5/134507270/dodokamamasika.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_6020d03f47b0c.pdfIn PDF document text
    • http://appletopshop.ru/movie_website_for_mobile_phonest4zqq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389570/normal_5febb01f55512.pdfIn PDF document text
    • http://takipleskazan.org/avid_pro_tools_11_crack_mac_osxv8jsz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_602b4ddfac8ed.pdfIn PDF document text
    • http://cherrypimp.online/boxotigfojf.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/can_you_use_a_phone_with_a_cochlear_implant.pdfIn PDF document text
    • http://sodalabs.pro/232622783656h74r.pdfIn PDF document text
    • https://zarojapejafaro.weebly.com/uploads/1/3/5/3/135347044/6125221.pdfIn PDF document text
    • http://universal-kirov.ru/what_does_commercial_vehicles_meanx7o5l.pdfIn PDF document text
    • http://fruitnaturs.space/how_to_produce_a_song_for_free3xunt.pdfIn PDF document text
    • https://kusovagojevo.weebly.com/uploads/1/3/4/8/134883394/leguxuvuwumatekolipo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xajowu/how_long_to_cook_country_style_pork_ribs_in_electric_pressure_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/approximate_methods_of_higher_analysis.pdfIn PDF document text
    • http://bojepudadadax.atwebpages.com/6703685262.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_off0000fae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE2 4892 bytes
SHA-256: 8b99d72725bcec64db3df9f1b357d551eb97f5c2fe7539f43748358ea6186a2c
font_01_sfnt_off00010b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B92 10772 bytes
SHA-256: 79283047fd9fe25eaed830de959a753f0e350dad6fc2ceab51a08ff6facf5d66

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