Malicious PDF — malware analysis report

Static analysis result for SHA-256 d047c63900191fce…

MALICIOUS

PDF

94.4 KB Created: 2021-04-18 23:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9f48c76bfb196bc7c65570b9a3e496a6 SHA-1: d29b6b7e9d7a46bc74b63741ed5e52dddbc12e70 SHA-256: d047c63900191fce811a2352366cec2d052ff419c6ac6caa13962b30afdddfd4
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://midufefew.ru/strik?utm_term=introduction+to+project+management+ppt+presentation', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/strik?utm_term=introduction+to+project+management+ppt+presentation PDF link annotation
    • http://fkpravo.ru/brandy_alexander_pie_with_marshmallowsvtsaq.pdfIn PDF document text
    • http://ellmax-site.xyz/nijepakkewgr.pdfIn PDF document text
    • http://robolab.one/orbit_12_station_irrigation_controller_manualh7kwc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474449/normal_5ffa6afb43e3f.pdfIn PDF document text
    • http://hhizmet.com/how_to_do_a_meeting_reportco91h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_602bb34773825.pdfIn PDF document text
    • http://naturebiolog.space/how_long_are_layovers_for_flight_attendantsczm2b.pdfIn PDF document text
    • http://urolog.xyz/953756961811bev9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_603f8cf08caa3.pdfIn PDF document text
    • http://golosa-spasibo.ru/49375906939t6l2o.pdfIn PDF document text
    • https://nazawerud.weebly.com/uploads/1/3/4/3/134353719/nagukomore_kanakovuxop.pdfIn PDF document text
    • https://wojodusu.weebly.com/uploads/1/3/2/8/132815854/8510976.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef27966-76a3-4ac0-b5f5-165501b75365/16958992409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb3f29b-6b52-41eb-9661-5da8fd2177dc/nobezopetapateruravunel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac61238-5389-44cd-91d5-90386d3c2507/93813272653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad7b68d9-ea51-453e-ab22-566b42b16d19/french_verb_conjugation_chart_parler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d0c6bd-5440-4d32-834a-1eee028db1a2/free_spanish_novels_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec64618-7d51-4312-8ecd-08039d697ce7/lexujigipesafuzabopijip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2393c6a-cf04-45e0-be37-05e18d2035ec/juzaxaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f811b29f-8180-4944-9944-351e658f244d/dolivukukidezigiluge.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 5372 bytes
SHA-256: 23ca2d852133ef1363f40715b977f7d2313ab8be248d5d8632be9a18b1529ca0
font_01_sfnt_off00010422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10422 13836 bytes
SHA-256: a59a560ddc753e75c52e999d9b256c32894bd3bec12fcad55dec8f868369dd44
font_02_sfnt_off00012c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C80 11384 bytes
SHA-256: 6048b6577231167926988400e8f0ec32bb3ff79104a4a17f10092ae734ca4727
font_03_sfnt_off00015341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15341 16972 bytes
SHA-256: a59c6c15687e0b8184c3baaf0e1127357bba3514a291e75dece7c719dc2c46f5