Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db03bb9d5fc6810…

MALICIOUS

PDF

89.1 KB Created: 2021-03-18 18:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dca6e0c677ba709a8424a8f523089144 SHA-1: c481926241e2b6998931af4d61543eb58227530a SHA-256: 8db03bb9d5fc681037ded98aa13eed62b683e6504afe2bb9a105075d39866db3
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 0.9991

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://resalured.ru/strik?utm_term=hoover+pro+clean+pet+carpet+cleaner+fh51010+review PDF link annotation
    • https://cdn.sqhk.co/dosovejozeb/Ahfejag/wewogosuv.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/ggBt5jj/werewolf_game_online_with_friends.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/bisigesum.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/cggjcij/binomo_apk_file.pdfIn PDF document text
    • https://cdn.sqhk.co/kenoramof/e2gcjhM/game_forza_horizon_wallpaper_8k.pdfIn PDF document text
    • http://instacopyrightcenter.com/37504322551i1t2e.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/ebChggi/baker_business_3_premium_apk.pdfIn PDF document text
    • http://megalit-korolev.ru/nordictrack_c_1270_pro_treadmill_troubleshooting6jtzj.pdfIn PDF document text
    • http://pubgmobiie.com/4th_grade_math_worksheets_long_divisionck26n.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/fjhZ5Lp/monkey_racing_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/IRrRjcU/tidewul.pdfIn PDF document text
    • http://opsnatur.fun/kalman_filter_matlab_example5f4cp.pdfIn PDF document text
    • https://cdn.sqhk.co/pimabosi/hesggAi/63456210622.pdfIn PDF document text
    • http://azorocheat6.xyz/what_is_linear_plotccaln.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetozativ/iiibygc/super_cobra_mustang.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/ii4Jljd/vetifazevukaxo.pdfIn PDF document text
    • http://zefutuwukeras.getenjoyment.net/29504152091.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/why_is_my_bunny_changing_colors.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/alphabet_letter_formation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5c4de3-2a0e-4f7a-8250-5f08e951cc64/webumun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e39a7d-160a-4bfb-912e-2cfcd2378e54/bebamowudim.pdfIn PDF document text
    • http://sopexalibip.onlinewebshop.net/fssc_22000_lead_auditor_training_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c22dff9-d623-4c07-a14b-6c47f9f48463/how_to_cook_gammon_steaks_on_a_george_foreman_grill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d39d436e-be5d-4621-9345-5275934be3ca/98454737147.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_off00011cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD3 5356 bytes
SHA-256: 2cabf41de158947bff27ac2700c4b4e0d3a0315e08ea660a383e05036f1d99ae
font_01_sfnt_off00012f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F25 11536 bytes
SHA-256: 0fb1f320b85570ca6ed5abe6052e126e38c3ea6769282deedcf9c8aa3ba41762

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