Malicious PDF — malware analysis report

Static analysis result for SHA-256 808f60b2b5a7a454…

MALICIOUS

PDF

75.4 KB Created: 2021-02-27 12:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d47099e5f3dec82799de8ac29941a9a3 SHA-1: 8cc5b863d00a42e998b7bf132a4cff705ca65ecb SHA-256: 808f60b2b5a7a4546b22259f00adad4acf1164bdd36cfcf1f6e769a8dd866213
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://vilenefex.ru/123?utm_term=how+to+make+slime+speech+outline PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416319/normal_600338febd21f.pdfIn PDF document text
    • https://zebakikalelu.weebly.com/uploads/1/3/0/7/130775248/jufegologonudugova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487186/normal_60150312a8376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_60336c600b399.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491410/normal_5fc999b019b10.pdfIn PDF document text
    • http://miludigava.22web.org/why_water_heater_pilot_keeps_going_out.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450140/normal_5fc87b8d78712.pdfIn PDF document text
    • http://spindlndou.space/how_many_new_covid-19_cases_in_illinois_today61lc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_6028ac36575a8.pdfIn PDF document text
    • http://zojulosopejozaz.iblogger.org/baidu_spark_browser_free_for_pc.pdfIn PDF document text
    • https://zuvexege.weebly.com/uploads/1/3/0/8/130814851/51a64a4b1.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/f86e79008fc5de7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lonozixugixapap.epizy.com/26326109309.pdfIn PDF document text
    • http://wijetifosoxi.epizy.com/59161114336.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/cg_movie_2019_hd.pdfIn PDF document text
    • http://vowaxuf.rf.gd/63466742554.pdfIn PDF document text
    • http://ladobuvop.epizy.com/jesetasafukewenipixadud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 5192 bytes
SHA-256: ae6626e78bea28f90da999f97052d393d3ad00d5f2ed6f118073f4dfce87a07a
font_01_sfnt_off0000f3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 10412 bytes
SHA-256: 9f107f031e9a73bb3cb3c885ad144ee33d2e47eec5cc218c47de72f954f9cc79