Malicious PDF — malware analysis report

Static analysis result for SHA-256 2883947301ebb1c6…

MALICIOUS

PDF

69.6 KB Created: 2021-04-22 23:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 58db9a12985484839bb0b663896a5c5b SHA-1: 26eadb1f77129c286ed7746f7b3bc09bdcf31a00 SHA-256: 2883947301ebb1c6396a2d96e0d16bcb5f16f501456b84aace315bedb7d4131d
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it was generated by a tool rather than being a legitimate document.

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://xezojetit.ru/strik?utm_term=hi+point+9mm+pistol+accessories PDF link annotation
    • https://wajativakol.weebly.com/uploads/1/3/4/7/134749030/nazegekupatufiw.pdfIn PDF document text
    • https://jefefobivepofo.weebly.com/uploads/1/3/4/3/134373202/saramen.pdfIn PDF document text
    • http://zalavovira.22web.org/contract_of_employment_template_nigeria.pdfIn PDF document text
    • http://koxoteripuxafo.iblogger.org/38331601550.pdfIn PDF document text
    • https://motaxajofepox.weebly.com/uploads/1/3/1/3/131381237/jepugosizapom.pdfIn PDF document text
    • https://mevinabepoke.weebly.com/uploads/1/3/2/7/132740553/dudezotusaxid-ninoliwozosuka.pdfIn PDF document text
    • https://zonotilikoper.weebly.com/uploads/1/3/1/0/131071062/xojumadatitirowagim.pdfIn PDF document text
    • http://zovunegem.22web.org/89281557768.pdfIn PDF document text
    • https://zowajapizuxazo.weebly.com/uploads/1/3/0/9/130969341/79b0209a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426679/normal_5fcbbeef339a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416502/normal_604e16bc773f5.pdfIn PDF document text
    • http://nalovegitiga.22web.org/neurological_voice_disorders.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lipaxunuvevi.epizy.com/zivibatamopulebiwazaxemaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a4337b-f0ff-463e-9084-487175af4102/traktor_s4_software_download_crack.pdfIn PDF document text
    • http://xozelabudizi.epizy.com/annabelle_1_hd_movie_in_tamil.pdfIn PDF document text
    • http://vanakodezifezuv.epizy.com/kisitatijewojefuzedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7938872c-47b4-4ce9-9b21-59f255c7d5f6/31904892085.pdfIn PDF document text
    • http://nivewuwasidurus.epizy.com/advanced_grammar_and_vocabulary_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c72f2b2-9130-4b0a-aea7-d13c805d694f/folk_and_popular_culture_ap_human_geography_vocabulary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95b4807-055b-4f6a-a4aa-f07f760c5e86/fios_quantum_gateway_router_modem.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_off0000d269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD269 5196 bytes
SHA-256: efcc276199e0ad7af7bb07f05a0be09e2b9b95ff2af6636b06f671e7b510e6e4
font_01_sfnt_off0000e3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FC 10880 bytes
SHA-256: 4bf8e1abfe523e77720c88a274bf737782f7068a6d712e47bda241f2f9e19b5c