Malicious PDF — malware analysis report

Static analysis result for SHA-256 66db96d942d85431…

MALICIOUS

PDF

85.4 KB Created: 2021-04-07 13:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1116c7d398e355c60a2073a91b97c398 SHA-1: 380901ee9bf0acc5a752ebe65036760fe5533b62 SHA-256: 66db96d942d85431283798130521df3c191131254be1d9ad7f4cd8d4114fe735
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on disposable domains or services like Weebly and S3, suggesting a link farm or redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://golowaki.ru/aws?utm_term=how+to+make+interior+design+portfolio+for+job PDF link annotation
    • https://zikepasut.weebly.com/uploads/1/3/4/1/134108801/4fea3a8392a68.pdfIn PDF document text
    • https://tesejusijup.weebly.com/uploads/1/3/4/7/134704228/tudaz.pdfIn PDF document text
    • http://rufoferapavinew.medianewsonline.com/angular_8_tutorial_espaol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392656/normal_6021074000c14.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/zid0ijg/death_shooter_3_contract_killer.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/ihIigqO/68722773444.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
    • http://jolovomolosubi.getenjoyment.net/lasopupeponatulukife.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/ljfbwid/letisewaras.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/aijWiaB/kacey_musgraves_rainbow_sheet_music.pdfIn PDF document text
    • https://sedixiru.weebly.com/uploads/1/3/0/7/130740143/8a286b.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/how_to_reset_boiler_pilot_light.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_603bd0cee5f4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sesijesule/why_we_use_chloroform_in_dna_extraction.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/wafomimijirozu.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/kukofatitonaravojuxurero.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/87351445298.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/what_are_the_most_important_excel_formulas.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/alvida_yaara_alvida_video_song.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_off00010cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB5 5692 bytes
SHA-256: 4c7affebe25aabf6bb09cf0b46dd483c57944f46f1aa3022f64e15504fa33570
font_01_sfnt_off0001200e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200E 11884 bytes
SHA-256: 70f1e19fbee5aa60e76cac30ce670cd3d4a3ca8918ffbc48602f9a8f6f3f2210

Open this report in the interactive analyzer, or submit your own file for analysis.