Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5873f3926d55c73…

MALICIOUS

PDF

69.3 KB Created: 2021-03-03 06:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 05d98cacf87a5d921d426bcaaf72a5f6 SHA-1: 342fe7eda5a90aacdb4ed39cf7dc484718cf2d14 SHA-256: f5873f3926d55c735998f43edbdad3260bb4312101bf770924ce0033ee64ecf9
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://mezovuduw.ru/wix?keyword=the+humanistic+tradition+volume+2+pdf+download PDF link annotation
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/wusup-woripuxunulisat.pdfIn PDF document text
    • https://lobalose.weebly.com/uploads/1/3/6/0/136089755/04a151398b4fda.pdfIn PDF document text
    • http://sweetygirl.club/osteoporosis_australia_calcium0jrse.pdfIn PDF document text
    • http://artyom.guru/pokemon_games_for_emulatorx2ylx.pdfIn PDF document text
    • https://fibigator.weebly.com/uploads/1/3/4/3/134313363/6540901.pdfIn PDF document text
    • https://xalemutaxites.weebly.com/uploads/1/3/0/9/130969461/2024552.pdfIn PDF document text
    • http://bit7.top/twisted_nerve_moviepfhfi.pdfIn PDF document text
    • https://rolarijigajegij.weebly.com/uploads/1/3/1/4/131438579/5068454.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/05e94b159a75c.pdfIn PDF document text
    • https://fijomenameti.weebly.com/uploads/1/3/0/8/130874411/dukanez.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/bugutaj/united_technologies_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/bizhub_c258_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/44481976151.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/tamil_bass_boosted_songs_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/pekeda.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/68713961124.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_off0000d3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B0 5628 bytes
SHA-256: 545c764e1d9ff4e33fec77bdb3a4883a9aa25503fc9e6e6963836bf07d0f1b4d
font_01_sfnt_off0000e6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BA 9600 bytes
SHA-256: 0c93bec4ed62ef3489638603f6c05eab972d64f884eb9b2a059c4555ac8a64d8