Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9172db8d9664d6…

MALICIOUS

PDF

68.9 KB Created: 2021-02-14 20:49:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0f97fb12563087e111b8ce82c89a83df SHA-1: 30a9f7aab5a262dff839a74f19ceddd44317cbe7 SHA-256: 3b9172db8d9664d6809100d81fe7b4871577e2794991356635f4571da3358702
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://seumenha.ru/wix?keyword=world+easyest+game PDF link annotation
    • http://triple-doska3.club/p-_touch_address_book_software7hi2b.pdfIn PDF document text
    • https://cdn.sqhk.co/tezasevimab/Jcjjw4S/lorunik.pdfIn PDF document text
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/3651354.pdfIn PDF document text
    • http://50offshop.pro/australian_culture_and_culture_shock_ielts_answersr1vun.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/nexonuxiden.pdfIn PDF document text
    • http://freehookup.xyz/ejercicios_de_objeto_directo_e_indirector0eco.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/3igidhh/megokotumuwesimobexon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426830/normal_5fddc967845b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420020/normal_5fd335e594db9.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/7770625.pdfIn PDF document text
    • https://sijujufe.weebly.com/uploads/1/3/4/6/134696532/b5a48fe60aa7cc4.pdfIn PDF document text
    • http://datingdate.site/publisher_small_tent_card_templateiw3v2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492871/normal_6004ddb9ca26c.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/ihhekif/lowasiwivejuwugo.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/rujimidujek/unduh_apk_biugo_editor_video_efek_ajaib.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/fibowew.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/18984515451.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/admission_form_2019-_20_kl_school_meerut.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_off0000d22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22C 5260 bytes
SHA-256: db6dee9b14e97f7993f4f809ceb5704cd5a3ba93531d2cb28fdd921ed04ce23b
font_01_sfnt_off0000e409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 10172 bytes
SHA-256: 0d76bd5162856980109c6b3dd9e26f687a083d6c055e02f13218714c2a8ed394