Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f2e59f20adbd1c…

MALICIOUS

PDF

72.0 KB Created: 2021-05-09 01:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0dc99b11f33bde863b2008417bb074f1 SHA-1: c700a4b2f3059d85b8328130a395f780fdedc6cd SHA-256: a5f2e59f20adbd1c9c072687188052cd016f8a7eb3638058df0ca8a1740d0f1b
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 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=how+to+pair+i-pilot+remote PDF link annotation
    • http://tamakar.tech/chaar_sahibzaade_2_300mb1ocmy.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/walinuzenavariraw.pdfIn PDF document text
    • http://wirelessinfo.ru/hp_puerto_rico_contact_number48isx.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/gegc3ii/final_fighter_apk_mod.pdfIn PDF document text
    • http://stnold.com/99444578249vwgzy.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/9hibjjU/web_browser_and_video_downloader_apps_for_android.pdfIn PDF document text
    • http://smcjd.com/72754965898rf9kn.pdfIn PDF document text
    • http://kulanefimolon.mypressonline.com/libro_caballo_de_troya_3_saidan.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/XjeLMjh/sunatudevalis.pdfIn PDF document text
    • https://cdn.sqhk.co/sojetaji/KquieF4/fewesakomakavatovu.pdfIn PDF document text
    • http://werikipirojenob.scienceontheweb.net/asherman_syndrome_adalah.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/dnd_5e_monk_character_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/jc3qwhS/dreamline_essence_shower_door_installation_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/gsKmhiv/one_golden_thread.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/pV9geqT/40162847043.pdfIn PDF document text
    • http://beliyden.xyz/stephen_king_book_list_in_order7mecc.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/gozanubuvamoxirapade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mivizuganax.rf.gd/common_core_math_assessments_3rd_grade.pdfIn PDF document text
    • http://tilufisarulisa.rf.gd/17669251731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b371211-aebe-4c9a-8c71-8557d985bbce/motorola_nntn8125_bluetooth_earpiece_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/264b569c-ac0f-42bd-ac01-678fcad4fda8/miwukeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/403f49e8-272e-4196-8780-a85babd8b07f/whirlpool_cabrio_washer_error_codes_ld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f124e9-c9d9-4ac2-8688-8607110b7d1d/tezuzozasoduw.pdfIn PDF document text
    • http://ravotosaxubepom.epizy.com/notuvuzopafuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f51b7ae7-1aed-4669-8700-c887273bc94b/27148265109.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_off0000dcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB9 4872 bytes
SHA-256: 02a32acb12bd764c967a8a771aef6bfd8d6f5a8cfcb1573045f5b64549ad4727
font_01_sfnt_off0000ed47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED47 10396 bytes
SHA-256: 73027ab949e9bf68f018eadbd241f99c824429ab0f34a225eb0817d05d9081dc

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