Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba4390e5937d5374…

MALICIOUS

PDF

70.9 KB Created: 2021-02-11 23:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4858eea5f127a9a69043ed53c7f55b62 SHA-1: 3cbb565ea0f8dccce5bf4869981d3d68694ac679 SHA-256: ba4390e5937d53747e12f54029f3fcc82cdcf81bdb424788c522add3810d1bde
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/wb?keyword=elastic%20collision%20problems%20worksheet%20with%20answers PDF link annotation
    • https://lulujazopo.weebly.com/uploads/1/3/4/7/134769354/780fef4950.pdfIn PDF document text
    • http://itslm.fun/spades_royale_gamez71zy.pdfIn PDF document text
    • https://luzafoku.weebly.com/uploads/1/3/0/8/130814295/7007289.pdfIn PDF document text
    • http://tehnomaster.net/bernina_bernette_55_instruction_manualpr7fp.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/4926671.pdfIn PDF document text
    • https://xutafutixon.weebly.com/uploads/1/3/4/5/134576274/2baba2c69e.pdfIn PDF document text
    • https://guzaluvezitalil.weebly.com/uploads/1/3/4/6/134645516/1866422.pdfIn PDF document text
    • https://wodorolijuzawex.weebly.com/uploads/1/3/4/7/134770742/2822088.pdfIn PDF document text
    • https://sazuwigigaxav.weebly.com/uploads/1/3/1/4/131407293/6562a484b.pdfIn PDF document text
    • https://wamabiror.weebly.com/uploads/1/3/1/1/131163705/4f2b368db76d92b.pdfIn PDF document text
    • https://binufigelivu.weebly.com/uploads/1/3/4/7/134775083/464914.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/lomogas/mass_effect_andromeda_best_weapons_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/7422050984.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/mazaleboviduwo.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/national_geographic_tv_guide.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_off0000d829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD829 5424 bytes
SHA-256: ab7235add0e2f3e02aec07c14dd8b900251f80d97a18fb63fe0922a48cc3d9f0
font_01_sfnt_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 10616 bytes
SHA-256: 10d0478c107fc6fb3470028ba9188a94a110ef59fd1e95418261dba5e48d4abb