Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff6a50fd845d292…

MALICIOUS

PDF

68.8 KB Created: 2021-02-16 04:38:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 545af985a44cc601e94ec1381d20bfff SHA-1: 391ca95773ea617abaef8623c95b5158996ff563 SHA-256: 5ff6a50fd845d2924cbe4427f5bab5a85325baf3e5ea927233d95a8dd6263213
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/wix?keyword=lg+aptx+bluetooth+manual In PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/3455391.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/Gjfgija/does_he_like_me_through_text.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/idjeiaC/feduzojovosurugukegedapov.pdfIn PDF document text
    • http://astrology-personal.online/hemoglobin_a1c_conversion_tablegctp4.pdfIn PDF document text
    • http://airet.space/makexuvanipere2h5.pdfIn PDF document text
    • https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/5d0893.pdfIn PDF document text
    • https://wibakaxidame.weebly.com/uploads/1/3/2/7/132741334/b70fa71620.pdfIn PDF document text
    • http://normab-id.com/nebulous._io_descargar_para_pcsdee0.pdfIn PDF document text
    • http://wildber.store/sunni_islamic_calendar_201808u76.pdfIn PDF document text
    • https://fijogukovope.weebly.com/uploads/1/3/1/3/131379832/rigugegadepagazes.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/mamibis/south_coast_fishing_report_june_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/anchor_bolt_types.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_off0000d1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EE 5108 bytes
SHA-256: 3f7e429c645a1bdc7baec3d694fda7b25babc703e2502545c05974ffc85e3300
font_01_sfnt_off0000e339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE339 10372 bytes
SHA-256: f8d1fd39eee3aa71ae5893dd4f9446aded9ce4f0c0efc98805aadc52e6f8b19a