Malicious PDF — malware analysis report

Static analysis result for SHA-256 48711759ae844836…

MALICIOUS

PDF

68.4 KB Created: 2021-03-03 20:28:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d00bc15e58e041e347ffb2b786c68808 SHA-1: 31d793e45880d58ee863d8359ff4e4d6d336649e SHA-256: 48711759ae8448364c9bcd4b34b3e289b01ae7aa121a65db1cee73e9e8ea84d0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=prentice+hall+math+pre+algebra+answers PDF link annotation
    • https://wuzesitawe.weebly.com/uploads/1/3/4/7/134733123/dedigifeka.pdfIn PDF document text
    • https://biruvosuvibu.weebly.com/uploads/1/3/0/7/130739381/melotowipus.pdfIn PDF document text
    • https://segagewemavovus.weebly.com/uploads/1/3/0/8/130874565/ddf7c789de28.pdfIn PDF document text
    • https://belumikifisa.weebly.com/uploads/1/3/4/6/134666155/mapawuno_refumolaxilamon_subokuru_rasezilukunuxa.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/lumudelat_vuxutapogojuz_sowesudatur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391636/normal_602bd9f888dfb.pdfIn PDF document text
    • https://pagopolekabob.weebly.com/uploads/1/3/4/3/134305888/lagunamiv_xutuzapozezetu_vufopidi.pdfIn PDF document text
    • https://guxodobozit.weebly.com/uploads/1/3/4/3/134333536/gilituwegok.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/joxagujana.pdfIn PDF document text
    • https://puwisubefubozaj.weebly.com/uploads/1/3/4/5/134516422/jotogesatebujedeju.pdfIn PDF document text
    • https://zafudibibini.weebly.com/uploads/1/3/4/1/134108698/be7fb31e20fa.pdfIn PDF document text
    • https://zirakamu.weebly.com/uploads/1/3/1/3/131398357/f8a36ea7c9b.pdfIn PDF document text
    • https://tulovituvo.weebly.com/uploads/1/3/4/2/134234708/854f01c25573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426957/normal_603d02c2de701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450356/normal_60178c5735023.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/sizabo/xovovo.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/conservation_of_mass_lab_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/95551987626.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/bagobo_language.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/formal_education_meaning_in_tamil.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_off0000ce79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE79 5580 bytes
SHA-256: ab8464630c48ac467a9ffe532264d1b17cc893d075407b2030a2a5de73ed0687
font_01_sfnt_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 10236 bytes
SHA-256: fcdbc415e8c6b7dc052e08d078216c19e49604ee3302f4ce4bf1ead036b10e88

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