Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c22203c0a4eb218…

MALICIOUS

PDF

69.8 KB Created: 2021-03-23 03:14:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e9c69a894bbab9db2b46bcd5d1ba6ba1 SHA-1: b6cf2191d4fa12ce16636af216878db61d062b94 SHA-256: 3c22203c0a4eb21891f41aa86a7d53acfcadb8d5740561659fcbcf8b93301766
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful content.

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 http://fowirunuwajuk.iblogger.org/adobe_acrobat_pro_9_mac.pdf In PDF document text
    • http://good-production11.site/how_to_screenshot_on_a_stylo_476n6d.pdfIn PDF document text
    • http://ens-pictures.ru/57623524904x0kpz.pdfIn PDF document text
    • http://cashbackk.site/xepesututubudinabh68nv.pdfIn PDF document text
    • http://parrrtner.xyz/batman_the_dark_knight_rises_full_movie_download_in_hindi_300mbxmhzw.pdfIn PDF document text
    • http://brumbum2.xyz/red_and_blue_balloons_decorationhgm73.pdfIn PDF document text
    • http://clubstore.pro/sevirezonedapozilinibar7lzgc.pdfIn PDF document text
    • http://myfavoritesun.xyz/puxazufrtumc.pdfIn PDF document text
    • http://khanapoorti.com/nosatyfz65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/jJyWpsOf3IE/wb?keyword=fe%20exam%20electrical%20review%20pdfPDF link annotation
    • http://surobufalinaxis.epizy.com/wuvuraduruvez.pdfIn PDF document text
    • http://mukovixajetunex.epizy.com/dorinetosaginugaxomav.pdfIn PDF document text
    • http://lowadof.epizy.com/clubbed_to_death_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b300a9-91e8-4ae8-b52c-121926806a6a/36886128633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40db85fb-ddf3-48c9-ba80-3b4a3aa8c421/50351287440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bece78d4-f141-4158-a854-db61be08cbe0/72168486668.pdfIn PDF document text
    • http://pulawev.epizy.com/70019573132.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/sikilijujox.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/reporter_gene_biology_discussion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c17c0cf-f157-452b-8f0e-faa55aa55489/wajoxof.pdfIn PDF document text
    • http://sexupoweduf.epizy.com/experimentacion_con_seres_humanos_y_animales.pdfIn PDF document text
    • http://xujogefup.rf.gd/36484519634.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/reason_behind_leaving_your_last_job_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56ea347-afd5-448d-8c5e-d4deba8374ab/valuvufanuripelumufisefot.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_off0000d162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD162 5296 bytes
SHA-256: e060239b4f25a4dda2d55fbf5e13d0724e5b1ba12636ed722397ef704c223ee9
font_01_sfnt_off0000e36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 10968 bytes
SHA-256: ff751d34690071b33077ebb68d3c37717a4c111c0e4e9ac0c13058129e8c4559

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