Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8da1e6f3d8f621…

MALICIOUS

PDF

65.1 KB Created: 2021-02-18 18:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 047d65771d0310ea2d41231d66cd29e2 SHA-1: b348f04bae90aa43837d0e2cf25643bd6fe5f076 SHA-256: 6e8da1e6f3d8f621a3811c6dcc1c0610cf39d2f1be8b590f4575e398b18c1bcc
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=free+body+diagram+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464313/normal_5fe75028c4436.pdfIn PDF document text
    • http://binixoloxagaj.iblogger.org/letter_of_intent_for_job_position_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529780/normal_5fc6a3e282190.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423431/normal_60060077eda4c.pdfIn PDF document text
    • https://dedodewoluxo.weebly.com/uploads/1/3/4/4/134402612/30832dad89f337.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496374/normal_60068a3c5170e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_601e11d05f820.pdfIn PDF document text
    • https://dapunilak.weebly.com/uploads/1/3/4/5/134506399/de7f7.pdfIn PDF document text
    • http://dobewobezusisof.iblogger.org/bazaar_movie_magnet_link.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495536/normal_602c1201cbafa.pdfIn PDF document text
    • https://pesopipuni.weebly.com/uploads/1/3/2/3/132303043/dafa1ace723dcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464702/normal_5feddf644d0b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417998/normal_5fcbe36da06e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_5fd9e32360d0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5fdb762e18cfe.pdfIn PDF document text
    • http://nuzenurego.22web.org/pujut.pdfIn PDF document text
    • https://bewodopogogubak.weebly.com/uploads/1/3/4/8/134886142/guniriladuge-zefezivusurava.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378845/normal_6008c6977ed97.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/boxalewijim/rice_krispies_cereal_bar_nutrition_information.pdfIn PDF document text
    • http://wijotifiku.rf.gd/business_report_writing_skills_ppt.pdfIn PDF document text
    • http://gaxugozoj.epizy.com/sociology_a_level_education.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/maryland_advance_directive_form_2019.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_off0000c37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37A 5560 bytes
SHA-256: 2f9e6954af0abf974b479f7a129d797c4bf4500ebd1162f9c1432b91640ac1f6
font_01_sfnt_off0000d64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64E 9528 bytes
SHA-256: b8c0f29111abac6a81f59c05a4b39f3d3a36ab61116ecbd561243f160cc02ad6

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