Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddef63cf1f53436b…

MALICIOUS

PDF

71.9 KB Created: 2021-03-07 17:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5b400ceb5a23ef7422aabf26ed0c14ac SHA-1: 983916daacdeffdcee4aef9fbe4ec40499d3e9e1 SHA-256: ddef63cf1f53436b2318a340b9fa638aca2a77c8239dd7882823479150d9ccea
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 0.9997

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://pelibifir.ru/strik?utm_term=zagg+folio+case+ipad+pro+9.7 PDF link annotation
    • http://tujijamutibe.sportsontheweb.net/how_do_you_remove_a_stuck_tupperware_lid.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/milubalikezugeparimaw.pdfIn PDF document text
    • http://afracheat2.xyz/movisimawilonazafukj8jh8.pdfIn PDF document text
    • http://wildboost.club/angels_of_abundance_oracle_cards_review72tww.pdfIn PDF document text
    • https://piworanup.weebly.com/uploads/1/3/2/6/132681558/gijewoboniniv.pdfIn PDF document text
    • http://shmelev.pro/how_to_find_roots_on_ti-36x_prohrdaa.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/roralu.pdfIn PDF document text
    • https://mikedexe.weebly.com/uploads/1/3/1/4/131452733/vivanevugurisikiboj.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/ninestars_trash_can_lid_replacement.pdfIn PDF document text
    • http://santecmb-sarl.com/14838152675loxxu.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/how_to_turn_on_pelonis_fan_heater.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/84938756969.pdfIn PDF document text
    • http://usacreditmonitoring.info/happy_wheels_android_oyun_club_hile480un.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kabuzore.atwebpages.com/zupufezazibinozere.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/peg_tube_medication_administration_steps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b441e3f6-3126-44bd-972c-37daada1663c/examples_of_supply_chain_management_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e3228d-d14f-44a0-9900-dfad71e7b38a/melezugolepetilupusegukom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a01890-6474-4b4d-ad02-ee6c47bd5c53/9268342833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77de443c-2ad1-4712-b27e-d315bde0d649/muminazuwujiwuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde38528-0cf0-437d-9662-3d5b812499c4/para_q_sirve_la_vitamina_de_magnesio.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_off0000dae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE8 5548 bytes
SHA-256: 3c938616f731e21b87e80e61b63e33e7a358b2021cd18c9b02084fbdca670d24
font_01_sfnt_off0000edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 10756 bytes
SHA-256: b2906c11ca8715dc9ac27e03a7222dc9702363de8c9634b9c40a8a804ef54d3a

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