Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa99e46e116ea19f…

MALICIOUS

PDF

84.2 KB Created: 2021-02-07 19:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 869506401a9dd1d92f7ccd3d28e9c56f SHA-1: d1f1f5c48da35714a05335b7cad4a58470455f4b SHA-256: fa99e46e116ea19fed1cea289550eccd5071a9b7826b37147911914168f5a894
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wb?keyword=not%20your%20barbie%20girl%20video%20song PDF link annotation
    • https://referozudu.weebly.com/uploads/1/3/0/7/130775612/zebir_jaranimelo_silevofuwep_lotutefatuxibov.pdfIn PDF document text
    • http://jegewuzewan.iblogger.org/tifazetipitebufibexi.pdfIn PDF document text
    • http://jezewujedufeg.iblogger.org/70790525002.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/Vhchd6y/history_of_religion_book.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/fhhR7UY/portable_soccer_dx_3._4_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/foturozav/hjfLggF/wumebuborabir.pdfIn PDF document text
    • https://tuvopezape.weebly.com/uploads/1/3/4/7/134712323/sisisulamades_nuremobuti_lijojoxetutaj_gagizi.pdfIn PDF document text
    • https://cdn.sqhk.co/novozefox/djhkTih/playtube_app_download_ios.pdfIn PDF document text
    • https://kowasazupajobex.weebly.com/uploads/1/3/1/3/131383373/ad7654eb7233c35.pdfIn PDF document text
    • https://kasewipiliri.weebly.com/uploads/1/3/4/9/134901701/5278274.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/Ijiichh/space_pew_pew_mod.pdfIn PDF document text
    • https://nowiwadigomu.weebly.com/uploads/1/3/4/0/134018048/7529673.pdfIn PDF document text
    • https://cdn.sqhk.co/dupamotim/fSicROK/pagavizalato.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/nitizobuv/blacksmithing_guide_cataclysm_1-_525.pdfIn PDF document text
    • http://javewexo.epizy.com/44565406752.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/xewanolanulopobe.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/gaxopajusuvelamemuru.pdfIn PDF document text
    • http://lofupiwosilabo.epizy.com/excel_templates_organizational_chart_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/42275838511.pdfIn PDF document text
    • http://neromozib.epizy.com/xijujugi.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_off0000ed08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 5264 bytes
SHA-256: b6d33458116081488d71731881660941e560c62d19a57058acd0e3a0df74ff66
font_01_sfnt_off0000ff01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF01 1996 bytes
SHA-256: 3f9ab4550e605113447c68f9502aa637cc2c95b7b011d60b836c725f291fd401
font_02_sfnt_off0001086c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 10700 bytes
SHA-256: e35538b1ee5b487c370c12bbca1d4d71c077a14cebe69df11cfa83c5f4ab327e
font_03_sfnt_off00012d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1D 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3