Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f37d2be6252ccb6…

MALICIOUS

PDF

74.4 KB Created: 2021-04-10 16:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b86daf3e2e43ca10d10bd798c43c0f8a SHA-1: de293590a2463d850c4b995c3e09299dcd780a29 SHA-256: 8f37d2be6252ccb6fc944f78d60359402330c5f688cbba17a63d1ebea7fc1a5c
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 0.9996

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://ponafet.ru/strik?utm_term=five+nights+at+freddy%2527s+2+version+2.0+1+apk PDF link annotation
    • http://uscarinsurance.info/pencil_drawing_pictures_of_girl_and_boycq57h.pdfIn PDF document text
    • http://betflixguvenilirmi.com/86337983764e1rlm.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/ebsgcmX/kulun.pdfIn PDF document text
    • http://fineagencyy.com/4633892663178h98.pdfIn PDF document text
    • http://probkin34.xyz/allahabad_high_court_ro_syllabus0ghb7.pdfIn PDF document text
    • http://phtech.site/is_hr44_4k_ready9vr5w.pdfIn PDF document text
    • http://rm-swis-mine.com/ejemplo_de_guion_teatral_para_nios06636.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/jdgj6ge/gesejamuvilaxokorexumij.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/ggiW1jf/cnc_milling_tools_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/VahehJA/ice_cream_run_rivington.pdfIn PDF document text
    • http://reduslim-europa.site/android_resize_bitmap_matrix4l5of.pdfIn PDF document text
    • http://damvglaz6.xyz/vazafibaa1mqp.pdfIn PDF document text
    • http://djami.ru/mulotaligurifutay2i48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sefuzax.epizy.com/how_to_use_pine_sol_to_clean_bathroom.pdfIn PDF document text
    • http://xokesuluz.epizy.com/graphic_design_proof_approval_form.pdfIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_b89fd5f05a694acea349cb4e9c5fa68f.pdf?index=trueIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_13e590c3574b4830bdd8e711c9779b15.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0f21c5-bcac-4436-a8f8-39b272a63b35/xanuderowumogefegovug.pdfIn PDF document text
    • http://zamipux.rf.gd/25160085589.pdfIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_4f74ca5f4aa34cb2b0f990027c0211f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ed29f0-9178-4c3b-8161-f6a10400091a/optimate_4_dual_program_battery_charger.pdfIn PDF document text
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_f1eb96bc7b1a455280109275dabb848e.pdf?index=trueIn 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_off0000e235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE235 5844 bytes
SHA-256: 1ee757df1327fe0fbc9c9d20156fdec198fdd68ec4d599089089c921cb6b9c58
font_01_sfnt_off0000f640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF640 11128 bytes
SHA-256: ad003c8e42d344bb742f5267d1f30fbfa2634c28584419f6b2fee4a181985186

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