Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfaa5ba00d0f486e…

MALICIOUS

PDF

72.8 KB Created: 2021-03-04 11:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d39698f17b784f1dac949078b7243a33 SHA-1: 2c04f4aba6e30f3d2f24b4a85ce593f52299089a SHA-256: cfaa5ba00d0f486e53e8208a3be4e5a40deb21622305c157f066ecbe508e2a40
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/strik?utm_term=navy+blue+shirt+dress+womens PDF link annotation
    • http://nifazafagikoxa.medianewsonline.com/jokorivuruma.pdfIn PDF document text
    • http://folejaf.mypressonline.com/holy_quran_english_version_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489722/normal_60051b61f1697.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/jjhcSUN/auto_clicker_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenemu/dsIAXHA/word_bliss_301.pdfIn PDF document text
    • http://ruvetimoroneb.iblogger.org/can_you_answer_calls_on_samsung_smartwatch.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/ic8QWgi/nupedujajifotigupowin.pdfIn PDF document text
    • http://bidusifekinu.66ghz.com/bootstrap_modal_popup_register_form.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/2idhbhh/cars_movie_poster_free_candy.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/zjbifEs/tauceti_technology_benchmark_requirements.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502920/normal_6019c8ed91140.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bixojal.rf.gd/arousal_affecting_sports_performance.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/kepubuv.pdfIn PDF document text
    • http://vakogez.myartsonline.com/16332817581.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/damituzerodekamaxo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA81 5428 bytes
SHA-256: b9dc5dce17cd1b28a1ac4e6e9d79718f39f71179fa263b9d6dfa3fb5cd04c6cd
font_01_sfnt_off0000dce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE3 10488 bytes
SHA-256: 3441c538e4eef91475ba29883a3c93dcd0b4dc981177c63d6ebaa33a14534575
font_02_sfnt_off00010101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10101 16144 bytes
SHA-256: f0a8b786da721c7415a59d91fbce3b20bbb98ea32e48857ac1ff22d53b00ec29

Open this report in the interactive analyzer, or submit your own file for analysis.