Malicious PDF — malware analysis report

Static analysis result for SHA-256 f684e111c1d9ba00…

MALICIOUS

PDF

74.7 KB Created: 2021-03-24 01:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: defcdc01fa8c20136b59e456e7c9052c SHA-1: e4ace933446a973296325c56635c9c4e0fa827a0 SHA-256: f684e111c1d9ba00af11c92382c80d365856e174d2bf2dd8c3be1fc80d71bf99
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs pointing to suspicious domains suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of common techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://nipisod.ru/123?utm_term=firefox+52.+0+2+esr PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500438/normal_5ff04c4e507cb.pdfIn PDF document text
    • http://flowerport.market/what_are_the_four_elements_of_a_state0m94f.pdfIn PDF document text
    • http://instapriz.online/methods_of_data_analysis_used_in_social_psychological_research492nt.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxixixixi/XDhchhf/pachtaoge_arijit_singh_ringtone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478408/normal_5fefcf8f5f8a2.pdfIn PDF document text
    • http://mafejaruvoje.sportsontheweb.net/circular_motion_class_11_formulas.pdfIn PDF document text
    • http://flylovel.com/gatehouse_keyed_entry_locksetf96gx.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvojeve/iegdhfZ/7062817855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415326/normal_5fefee563c745.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/gfha4ia/call_of_mini_zombies_double_shot_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wawabosamugo/jgkagjR/dudotolukovirogas.pdfIn PDF document text
    • http://godotobekof.scienceontheweb.net/authorized_honda_lawn_mower_repair_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368478/normal_5fee69560f870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465269/normal_602bb075e9d9c.pdfIn PDF document text
    • http://allerop.xyz/21512401165vyrio.pdfIn PDF document text
    • http://zabavnyi-slon.ru/nccn_guidelines_moderate_emetic_risk5fmts.pdfIn PDF document text
    • https://cdn.sqhk.co/jategumeb/hcSih2M/mc_survival_guide.pdfIn PDF document text
    • http://tesocoin.online/banjo_song_video8gif8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458145/normal_60055eef5d882.pdfIn PDF document text
    • http://matcobzor.ru/61189878824e8h26.pdfIn PDF document text
    • http://invitesistem.ru/harmony_hub_alexa_review4zwfx.pdfIn PDF document text
    • http://meetly.space/bissell_powerforce_helix_manualfxo31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xobibaga.myartsonline.com/section_3._1_the_rock_cycle.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/how_to_replace_battery_on_dyson_dc59.pdfIn PDF document text
    • http://sinusudixuxuwad.atwebpages.com/vodapujop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEC 4972 bytes
SHA-256: 38ab9cd6f28518ff010cadec95358016a7bb475e5706b91ce268d236f0368040
font_01_sfnt_off0000eef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF5 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_02_sfnt_off0000f834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF834 10708 bytes
SHA-256: c48a8b4f993103859d8df20f2f15f064d44f756b27e1e5c2cec7dd7500060395

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