Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa7b923433eaccb…

MALICIOUS

PDF

79.6 KB Created: 2021-04-02 00:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3fa01225bd27b00c7f0502fb41b19c01 SHA-1: dbd76d873d3cce0b482371af1df78c89e372fa55 SHA-256: caa7b923433eaccbea614edb6aed61dd0f7c47be23d45f432297c3db3dc1cb05
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URLs, many hosted on disposable domains, suggests a link farm designed to redirect users to potentially harmful content. The PDF's structure and embedded URLs align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=que+es+un+liderazgo+paternalista PDF link annotation
    • http://topcabinets.xyz/dr_jekyll_and_mr_hyde_quotes_about_evil9qm52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456122/normal_60370fa5304f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382408/normal_60092a5fbacb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470677/normal_60466d719e52f.pdfIn PDF document text
    • http://rakapugijumub.sportsontheweb.net/10408764455.pdfIn PDF document text
    • https://nuribivavis.weebly.com/uploads/1/3/4/6/134625990/11510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476152/normal_6000ccf78823e.pdfIn PDF document text
    • http://palopepidek.mypressonline.com/sosesat.pdfIn PDF document text
    • http://dombitarf.ru/21119695955j7bjl.pdfIn PDF document text
    • http://smartroom.pro/sword_art_online_volume_1_aincraddxw1x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370063/normal_5ffcc13f45cac.pdfIn PDF document text
    • http://sethel.xyz/cheats_for_gta_5_ps4_free_moneyx9fbv.pdfIn PDF document text
    • https://nudozulewofofij.weebly.com/uploads/1/3/4/7/134711849/fidixiri.pdfIn PDF document text
    • http://accface.in/8216177056kzh51.pdfIn PDF document text
    • https://wavixozuxukoreg.weebly.com/uploads/1/3/1/3/131380445/2015854.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/2074273.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiralemosokeze.epizy.com/77748596623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d01630a8-2da5-466c-bed5-6af27b578cca/zagg_messenger_folio_ipad_pro_12.9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6518da40-f63b-46f6-9fbd-3a02e35e082a/philips_multigroom_series_5000_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ee8285-be65-4107-b73b-09537686d3a7/29296568772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/933acb5c-8293-4344-be24-fc0b378b976e/dimanixigolirim.pdfIn PDF document text
    • http://dumizalu.epizy.com/bodybuilding_training_plan.pdfIn PDF document text
    • http://lejipuzab.epizy.com/21698434359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f791466c-5a2b-4a27-bde7-6f3fe6bf6153/rca_tablet_reviews_10_inch.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/welinaredaxivajedatomiti.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_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 5240 bytes
SHA-256: 084f681bff235927a2777c7e27d54a7136cef36af552e5ba36d78fffd801f9f9
font_01_sfnt_off00010b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7F 11476 bytes
SHA-256: d5c9d16c823850f4377145797134638c5c160b1e7f1aa6cbdc143f718800e6d5

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