Malicious PDF — malware analysis report

Static analysis result for SHA-256 1899b6c09e090c64…

MALICIOUS

PDF

71.8 KB Created: 2021-02-19 18:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d0f692e5c0e32aff61b08d2dd066d5e8 SHA-1: c79bfbb7205fa82f3de8aa76cfa402c16360b86b SHA-256: 1899b6c09e090c64784525a2b6dc35ef06d2b0d0add3a5e50876ea949e123f3b
196 Risk Score

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.
  • 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://bologen.ru/wix?keyword=tictactoe+java+github PDF link annotation
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/8775902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471095/normal_5fe62111002ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_5fd6983497b5e.pdfIn PDF document text
    • https://zudiwimuda.weebly.com/uploads/1/3/1/4/131438079/8879b1d857e02.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/dibobavevezilim2z482.pdfIn PDF document text
    • http://winoraama.website/music_awards_tonight_2019_performance_list97xme.pdfIn PDF document text
    • https://fefufivakelazi.weebly.com/uploads/1/3/0/7/130739222/282084.pdfIn PDF document text
    • https://levalezekavazif.weebly.com/uploads/1/3/4/6/134639406/a923fe0a7ccc64.pdfIn PDF document text
    • https://fenorepaxok.weebly.com/uploads/1/3/1/8/131856491/nowadufufuwovamenige.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/levumoduf/bein_sports_nz_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/gababifonitog.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/gikedosadanojal.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/camranger_app_for_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97C 4980 bytes
SHA-256: c75baea6a6a16ae4b8479df8dd29e8f7fc6ad59f2bb0fef02c97a6051be7a4de
font_01_sfnt_off0000da80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA80 10072 bytes
SHA-256: 31e9e3ecbdcecd1ade0672ab96cee99d7ef83a0b279f4d5ec6e121e76d23f200
font_02_sfnt_off0000fd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 16168 bytes
SHA-256: bcfecb9fde4b74e4a2b692e15caf305b2988a1cfe4c6386614002e38d35feb86