Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5537f8d9f335ae9…

MALICIOUS

PDF

73.1 KB Created: 2021-03-19 14:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 05b334dfbdcc61373f9cc2d18fba675d SHA-1: b44e7621271bad7c61d08326d876109244a53294 SHA-256: e5537f8d9f335ae9d79ca3966f5e49610f4708a5e71ecaa561017eaf9d475e9c
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating it is a phishing lure, specifically using a book title as bait to redirect users to external URLs. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://botokaw.ru/wix?keyword=book+of+mages+the+dark+times+hacked PDF link annotation
    • http://sewakasatixori.medianewsonline.com/jowutewugivirenikujagu.pdfIn PDF document text
    • http://kuboduzuke.mypressonline.com/pepufer.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/55172540117.pdfIn PDF document text
    • http://reduslim-siteofficial.site/the_fourteenth_goldfish_settingqumsh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448985/normal_6013f4f6ea46f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366028/normal_5ff7d6b0e0466.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470029/normal_5ff4a1654236c.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/the_count_of_monte_cristo_book.pdfIn PDF document text
    • http://cherrypimp.online/boxotigfojf.pdfIn PDF document text
    • http://ketosimple.online/cladogram_worksheet_answers_human_snake_monkey_lizardbx4mp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_60294c397755d.pdfIn PDF document text
    • http://zigapajuxijado.mywebcommunity.org/25817021324.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/wogekipapowewetod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465274/normal_5fcf51ba2fba1.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/fukepez/bad_time_simulator_hard_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/54049495645.pdfIn PDF document text
    • http://mujebik.atwebpages.com/zatadusixopezupugi.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/fasuzekorobepugij.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/passport_around_the_world_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/hallelujah_euphonium_solo_sheet_music.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/how_do_you_review_a_health_and_safety_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/wd_my_cloud_app_for_android_tv.pdfIn PDF document text
    • http://fuwutowamig.myartsonline.com/todo_sobre_el_hinduismo.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_off0000e215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE215 5516 bytes
SHA-256: f6bf14128daeafa1cc3e049ebddc38d7fad4adbed4fa12a01577ea2b7ac4d54c
font_01_sfnt_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 10032 bytes
SHA-256: 2bc04c3b96cbf59833f472ed4f038479baf02910d8b8fb410338401ed4935b25

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