Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a5b232a796c11e…

MALICIOUS

PDF

84.5 KB Created: 2021-02-28 01:08:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 653c7cbbbb88a39bbf7b37ddd12eb10a SHA-1: b84d2434f955650bccc424df1d08baa766a6be50 SHA-256: 89a5b232a796c11eed19e1546b3ca556451d545daa538d99acc89b846106be2d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or phishing operation. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior. While no scripts were extracted, the presence of numerous external URLs suggests an attempt to redirect users to malicious or deceptive content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=jumper+dress+patterns+uk
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/2d328.pdf
    • https://zodukaveg.weebly.com/uploads/1/3/5/3/135345947/3310423.pdf
    • https://repanari.weebly.com/uploads/1/3/5/3/135308988/0de297f768adb.pdf
    • https://romarifekaxa.weebly.com/uploads/1/3/2/6/132683260/soragasenori-futupezavadesij-sibab.pdf
    • https://senevilamopon.weebly.com/uploads/1/3/0/8/130814687/fapomejalu.pdf
    • https://cdn-cms.f-static.net/uploads/4458137/normal_601837c017071.pdf
    • https://nobiramiw.weebly.com/uploads/1/3/4/4/134403563/zoneje.pdf
    • https://telapawuwa.weebly.com/uploads/1/3/5/9/135964826/1118791.pdf
    • http://interbankdigital.com/what_is_active_control_on_philips_tvy90xt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/somisilegex/oxford_advanced_dictionary_8th_edition_free.pdf
    • https://s3.amazonaws.com/rotowan/eastleigh_college_ofsted_report_2018.pdf
    • https://s3.amazonaws.com/tezude/zomimuxid.pdf
    • https://s3.amazonaws.com/zepifudoxapo/dragon_slayer_osrs_low_level_guide.pdf
    • https://s3.amazonaws.com/vanatul/nizuvo.pdf
    • https://s3.amazonaws.com/lazolu/rugatezabowizov.pdf
    • https://s3.amazonaws.com/risalenefazozo/business_income_coverage_form_definition.pdf
    • https://s3.amazonaws.com/biwubeleba/23738972468.pdf
    • https://s3.amazonaws.com/lanorolowu/gizat.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f09.bin
b552f29784ecc5e79b4e725cd88f402ff9f89addfc9f0fdd65edbdfd7d84737a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F09 5124 bytes
font_01_sfnt_off0001205b.bin
bcdba5a8e721ce2355c58a86ad9666240ade60445aaf0ec867594c81f6693ac1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1205B 10696 bytes