Malicious PDF — malware analysis report

Static analysis result for SHA-256 88af874698551567…

MALICIOUS

PDF

162.8 KB Created: 2021-01-01 08:42:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c9b8fa9cbce3ec5bc83c5b8d27cb0d5b SHA-1: 3ff2945f0009177a0c7c40213a25cc5658899e4c SHA-256: 88af87469855156716990bf6eb76d4e36ff7e7da89b03959735d1b92e7ad9ecf
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=2010+camaro+ss+horsepower In PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/99c6d131e.pdfIn PDF document text
    • https://mepuralomelefaz.weebly.com/uploads/1/3/4/4/134494325/585703.pdfIn PDF document text
    • https://miniroworopan.weebly.com/uploads/1/3/4/4/134444940/digukik.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/L5iexG7/ghosts_in_the_toy_box_chapter_1.pdfIn PDF document text
    • https://gasovopur.weebly.com/uploads/1/3/1/4/131453365/kakonesolozowezega.pdfIn PDF document text
    • https://tiralilibixadu.weebly.com/uploads/1/3/4/5/134500138/9965b5cb7c9f77.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/gd6ghDl/ding_dong_xl_leaderboard.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/tiluwisulepam/animal_farm_chapter_10_understanding_irony_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/95625756224.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/tamano_de_los_planetas_del_sistema_solar.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/jiwifoputibejamuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df4346a4-3060-4cc0-bf74-6b2cede8acaa/teddy_bear_love_images_full_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/business_law_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/budget_2019_highlights_upsc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af237216-b29e-495d-8d47-ffab697c706a/puxuligedezuluxusipikusas.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/ap_statistics_chapter_8_test_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A02 10096 bytes
SHA-256: f526364c55b77ce5e47ce571c3e7f42a929bc5e6a8e47afd75700d5d671889fc
font_01_sfnt_off00022ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22AE9 5464 bytes
SHA-256: a1edab6db92794387754fda00f46ef804aa9cd914516e9fa50d21577787e4a76
font_02_sfnt_off00023d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23D65 13180 bytes
SHA-256: a25f20a6551593f577fb8065a1308c18f83867dca7816740702b6c97382e3edf
font_03_sfnt_off000267dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x267DD 16196 bytes
SHA-256: 9cbb15b4b841676daa57fb73e5e825d2d5f916b9806cce18d3a52cb44d72a348

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