Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2430f5eff722c48…

MALICIOUS

PDF

68.6 KB Created: 2021-04-02 05:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1423fe6897ab338448d38f24d4af2057 SHA-1: 5a4102468ee110d14eaee59539834584765454c6 SHA-256: c2430f5eff722c48ab68ea1d77e41bd3275cb0f3289e8dc93d41995eb3c53b7b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and the link farm heuristic suggest an attempt to lure users to malicious sites.

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://resalured.ru/wix?keyword=3ds+pokemon+randomizer+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497095/normal_604cf9d67ee81.pdfIn PDF document text
    • https://cdn.sqhk.co/bopesajan/TbWbnyS/49200129404.pdfIn PDF document text
    • http://jedefanase.22web.org/obras_de_simon_bolivar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384149/normal_5fee07ee80b82.pdfIn PDF document text
    • https://cdn.sqhk.co/pedajobu/gMPuPjg/60258719619.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491151/normal_5fffe704ac6ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450506/normal_5fc6f88262436.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://shop-onlain.fun/435219986913r9tb.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/78479611195lidc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_60570b955e857.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikifabaf/ROdxPDj/when_will_marshalls_near_me_open.pdfIn PDF document text
    • http://good-production17.site/how_do_you_unclog_a_nozzle_on_an_epson_printerraxm8.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/jiJoibk/simpleplanes_flight_simulator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusupap.rf.gd/curso_de_ingles_e_audio_gratis.pdfIn PDF document text
    • http://lowojavaxawen.epizy.com/small_gps_tracking_device_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046061a4-cbf8-4115-8209-989ea33b9509/ratofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11fc8f37-6a1a-453f-9e23-2ffbc79d1c90/simanunizuravex.pdfIn PDF document text
    • http://tewenusewokux.rf.gd/66416832162.pdfIn PDF document text
    • http://nanolato.rf.gd/fawejivup.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_off0000cd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD50 5532 bytes
SHA-256: b5e47a90ffe8ba0d1cc69e074fe9684707b39a0e19ee0541014b6b308dafff20
font_01_sfnt_off0000e00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00A 10500 bytes
SHA-256: 2f1560ac4cd10450c16fdbc63ff29dc081b36889aecd06c80c069ba3f877dafa

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