Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e9374ba58ca45c…

MALICIOUS

PDF

73.1 KB Created: 2021-02-28 09:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0d0c64d376f6c78f86e52992de804829 SHA-1: cad03f2080b22cb16fef0d2ff77ab1753b331a9f SHA-256: f2e9374ba58ca45cadebe509285fb39dbb2320d9b9aafd8fe0e6a5a23f740300
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=d%2526d+3.5+divine+power+feat In PDF document text
    • http://dadefuxafovub.22web.org/ausfllhilfe_fr_die_anlage_er_2018.pdfIn PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/2011821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_600c1dd284f86.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/coleman_powermate_air_compressor_parts_canada.pdfIn PDF document text
    • https://mugokirupela.weebly.com/uploads/1/3/2/6/132681863/luzav-fulesoxezez-xalugerukaki-tanerigotiwed.pdfIn PDF document text
    • https://libufuvebugun.weebly.com/uploads/1/3/1/4/131406816/sovutopasore_jupuwotiga.pdfIn PDF document text
    • https://satoteje.weebly.com/uploads/1/3/2/6/132682597/taruluvo.pdfIn PDF document text
    • https://jawutasujo.weebly.com/uploads/1/3/0/9/130969833/3737796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_603b258ce1069.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/padosumifubobo/6863495405.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/7356423179.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/last_day_battleground_survival_v2_game.pdfIn PDF document text
    • http://gemakeruw.epizy.com/yume_no_sekai_he_piano_sheet.pdfIn PDF document text
    • http://pomisatavep.rf.gd/fearless_friday_basketball_3a.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/fobuvimazajisebozi.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_off0000e6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CC 4156 bytes
SHA-256: bb1702a9e9b617346157f9ea6f36cc14559c37d4a4a2cf683ebd57dce9d2c082
font_01_sfnt_off0000f4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FB 10224 bytes
SHA-256: 9b6495724cdb736901c9bb78e792fbf8ee02c529bc915fa9401704e085720bed

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