Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c07a985787c2d7…

MALICIOUS

PDF

111.5 KB Created: 2021-01-17 10:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 586983fac72badf4912330fe97ce502e SHA-1: b97cc9c60ab6429986f5dd0d4c9648fd93ad24bb SHA-256: f7c07a985787c2d7c1636fc96950f91ade263ffec4e2a3cf74556cebd302a3b0
184 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains and redirectors, indicating a link farm designed to obscure the final malicious destination. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 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://traffmen.ru/123?utm_term=space+flight+dynamics+pdf In PDF document text
    • https://cdn.sqhk.co/govulasem/cjaidY0/sapoboxovejirotovat.pdfIn PDF document text
    • https://site-1175420.mozfiles.com/files/1175420/bollywood_emotional_songs_free.pdfIn PDF document text
    • https://site-1174423.mozfiles.com/files/1174423/mibajiwexinifotoxuro.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/p8iegjR/telemedicine_companies_hiring_nurse_practitioner.pdfIn PDF document text
    • https://site-1173660.mozfiles.com/files/1173660/apowersoft_screen_recorder_apk_for_kitkat.pdfIn PDF document text
    • http://xejevojesinil.22web.org/gapugimanifos.pdfIn PDF document text
    • http://lokogosomezik.iblogger.org/auditory_hallucinations_piano_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://deroselewem.epizy.com/61879421672.pdfIn PDF document text
    • http://lozebaloporan.epizy.com/alphabetical_order_worksheets_for_class_4.pdfIn PDF document text
    • http://puvusevakap.epizy.com/45717549990.pdfIn PDF document text
    • http://dolasuwukino.epizy.com/wepox.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/hollywood_movie_tamil_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/6565034713.pdfIn PDF document text
    • http://vufigenetusanu.epizy.com/bajepojo.pdfIn PDF document text
    • http://fizuxobitunoge.epizy.com/clasificacion_de_canales_ionicos.pdfIn PDF document text
    • http://folijurojavagig.epizy.com/fusalidas.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_off00014df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF0 5356 bytes
SHA-256: dfb2645838d4a9ccd3c0a6c8b5e5f4490cd667c7ffb10e5a0ce88c3059d29219
font_01_sfnt_off00015ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FF9 13280 bytes
SHA-256: 836cf1bca2d00605979523f1a37dc7ce323a0a78df53989feb1b344c8ed634b7
font_02_sfnt_off00018daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DAA 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940
font_03_sfnt_off0001a213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A213 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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