Malicious PDF — malware analysis report

Static analysis result for SHA-256 678613e16dd84fb1…

MALICIOUS

PDF

78.3 KB Created: 2021-03-25 16:33:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dc30194e2c6241a706e7948850ba1bb3 SHA-1: 8beafff2b92a2d6274d7b49573ed652a80f3077c SHA-256: 678613e16dd84fb179aeecff1f02c42825766437b7d2d03f83080943ce74d65d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://leonvi.ru/123?utm_term=report+brevet+des+coll%25C3%25A8ges+2019+canicule PDF link annotation
    • https://junapeborizako.weebly.com/uploads/1/3/4/4/134443413/8817b5a300a2fa3.pdfIn PDF document text
    • https://cdn.sqhk.co/joxusozomilo/jaijcVN/67632761144.pdfIn PDF document text
    • https://betufevu.weebly.com/uploads/1/3/4/0/134098732/xanavaxorizukulop.pdfIn PDF document text
    • http://xsale.trade/defawufugiwonukizaxiruzubt8awn.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/gibukaz-ludokan.pdfIn PDF document text
    • https://cdn.sqhk.co/zaliroded/ZVjcyjj/letter_writing_format_for_leave_in_school.pdfIn PDF document text
    • http://sweetmeet.online/simple_present_perfect_tense_worksheets_with_answersvvud2.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/hfrieMb/81114341303.pdfIn PDF document text
    • https://pazolumaf.weebly.com/uploads/1/3/4/3/134356568/gumekit_jorim_nisowajuse_foximoxederu.pdfIn PDF document text
    • http://snapchat-alert.com/dewopunofereb7teth.pdfIn PDF document text
    • http://montana-media.com/como_hacer_corona_de_adviento_para_niosfavxf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8ccdde0-49d6-40de-8407-57978e6f49bd/avaya_one_x_communicator_certificate_installation_guide.pdfIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_2e3ebd3336074056b4fe813be9ac0b6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/dibifuruxefi.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/allavsoft_video_er_portable.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/poxajawovuti.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/43660521402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e37bf7-a4d5-4731-883e-db8999e2bc05/is_links_awakening_a_sequel_to_a_link_to_the_past.pdfIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_3d2b181a3ac04eb0b523c7da0c23ef98.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varolexexus/huawei_y9_2019_android_pie_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2cb399-b635-4085-9349-bf268507ad48/free_storyboard_tool_online.pdfIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_457cc7412d854ee5b7a169b99c422d06.pdf?index=trueIn 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_off0000eb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB60 6072 bytes
SHA-256: 912c3785e3d49779f9d1313f84223235bc6f180af9b03b620c5d2d0e5be1283d
font_01_sfnt_off0000ffdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDC 13152 bytes
SHA-256: c8935637a67f8b8b6c261bd0a107aac19df70ee530c920c4190255bac7b090c3

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