Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00e8bb52ddbb09a…

MALICIOUS

PDF

73.0 KB Created: 2021-03-19 16:07:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1274a2abc4b5970abf09995a4e441d50 SHA-1: cb48d0bb09909f008403b19fe63a76399e825c47 SHA-256: c00e8bb52ddbb09a6cae174a415e5b38e69e0c0e4e02c0cd6a3579d3791417cf
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were extracted, the PDF structure and numerous URLs point towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=dell+latitude+e5470+bluetooth+driver PDF link annotation
    • https://cdn.sqhk.co/vajegipofuz/jd6gfja/walmart_neighborhood_market_springfield_mo_campbell.pdfIn PDF document text
    • https://jewesorovusupim.weebly.com/uploads/1/3/6/0/136092124/nelasijo_dazapil.pdfIn PDF document text
    • http://sallles.ru/45116933376uyyfv.pdfIn PDF document text
    • http://presalle.xyz/where_she_went_plot_summary_wikipediawc0y2.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/IEbgchf/ww2_battlefront_simulator_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/ejejihY/8307962348.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/7332046.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/UPVvmcn/marketplace_phone_number.pdfIn PDF document text
    • http://fitokapss.xyz/lobib8t2cf.pdfIn PDF document text
    • http://delaem-sami.online/scientific_method_quiz_middle_schoollj80e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://witeguxatuzidaj.epizy.com/avast_antivirus_free_xp_2006.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_9ab424494de44979b0947db51ef34c9f.pdf?index=trueIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_f6793a57dd6144f3b95680233f45fdb1.pdf?index=trueIn PDF document text
    • http://memokikadu.rf.gd/nc_dmv_change_of_address_form.pdfIn PDF document text
    • http://gikekim.rf.gd/international_capital_market.pdfIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_b186b68ab42545b6b06ba8d48344384f.pdf?index=trueIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_8c1e77a84c5640d99529f09830c65769.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_e9a35d98cfd143fa9a3fbe19039c0fc9.pdf?index=trueIn PDF document text
    • http://danofida.epizy.com/do_navy_officers_get_bonuses.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_4e09c5b05a66481d90ce2c6e0ef1d267.pdf?index=trueIn PDF document text
    • http://gudazakagozugaj.epizy.com/48609774438.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_off0000dfbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBE 5368 bytes
SHA-256: a3ffa02bad6fe9dd90bd8bcea6c99773964e33b891884a7dca3725d0961e4838
font_01_sfnt_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 10992 bytes
SHA-256: 1e3920e04735bb9f858fec8922d391c4406432fe013f6b44412a747606f75380