Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a841d92e957f386…

MALICIOUS

PDF

64.5 KB Created: 2021-02-17 23:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 98374f853978389b7857912f1c9b991f SHA-1: d664671cfa9926aac62f41a43ec630028141ea0c SHA-256: 9a841d92e957f386a69cfb797143c8a6ea1e8d5e73b6e9bf7676ec611fcfeb95
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=honeywell+barcode+scanner+installation In PDF document text
    • https://polatubogo.weebly.com/uploads/1/3/4/5/134598163/walesav_lagose_powifuxido.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/f9c1e900.pdfIn PDF document text
    • http://datinge.site/336564401662myf2.pdfIn PDF document text
    • http://idealicaitalia-official.site/candy_crush_mod_apk_unlimited_goldcti2x.pdfIn PDF document text
    • https://xizadububexo.weebly.com/uploads/1/3/4/5/134595199/8395280.pdfIn PDF document text
    • https://kezodedekupamo.weebly.com/uploads/1/3/4/6/134605888/ccbedeb16.pdfIn PDF document text
    • https://sagagokibifaku.weebly.com/uploads/1/3/4/6/134625973/xawibugaxuvakaninile.pdfIn PDF document text
    • http://idealica-ufficiale.site/74865368622g1ld0.pdfIn PDF document text
    • http://ewop.space/spreadsheet_software_free_windows_10chwon.pdfIn PDF document text
    • http://wiregabjuk.fun/application_software_informationyplij.pdfIn PDF document text
    • http://4bochki.ru/91805859878lo6el.pdfIn PDF document text
    • https://gulufoge.weebly.com/uploads/1/3/0/7/130776817/dosimopamopururaga.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/bulikowexunepov/fire_stick_tv_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/alpena_led_lights_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/bazataziva.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_off0000c1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B5 5228 bytes
SHA-256: 09e995824434d0088d3ec74168675d733ddba0e61bcc9b60c2d73993d0396f3c
font_01_sfnt_off0000d396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD396 9824 bytes
SHA-256: d27f388c05dfdb9b5491cc1f6c0940390b5db5613e374b1a3621a058ae0eb673