Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfc54367f837d11…

MALICIOUS

PDF

70.3 KB Created: 2021-01-30 16:02:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3d6f07967b1dbbde1ea00a1fa5c3bd58 SHA-1: cd5744ed9d275db3360c516e4f63c43a3e83f730 SHA-256: 5bfc54367f837d1122f4d056e144f2f2746e041dbee42925914ffb14bf0453b2
184 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that redirect to external websites, with one specifically identified as known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links suggests an attempt to drive traffic to potentially harmful content.

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
  • 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://ggtraff.ru/wb?keyword=warlords%20of%20new%20york%20expansion%20xbox%20one In PDF document text
    • https://cdn.sqhk.co/rezeribevi/jfYji6A/download_euro_truck_driver_2018_for_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/NUjijif/kingdom_nick_jonas_season_3.pdfIn PDF document text
    • http://tk-pobeda.site/43993063434jj675.pdfIn PDF document text
    • http://biomanua.website/405123545133wkpl.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/bogixivubofafof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462046/normal_5fd645d9866ec.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/kfugeKv/bodelijuzadajife.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/6ad4d.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoletef/Mjg6FMr/donoreruxepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_5fe9789d37737.pdfIn PDF document text
    • https://bozalofagolukor.weebly.com/uploads/1/3/0/9/130969011/xuwepoxenesa.pdfIn PDF document text
    • http://metalllift.ru/teologia_biblica_y_sistematica_myer_pearlman_wordk6jgv.pdfIn PDF document text
    • https://zirefugat.weebly.com/uploads/1/3/0/7/130740019/xubali_dalun_xapitetopek.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/jesidofefe/abrsm_jazz_piano_pieces_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/bleacher_report_arsenal_fifa_19.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_off0000d576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD576 5516 bytes
SHA-256: 7d527e10b53cde8ad3c552711e2f539b471b115aca2f905f4ab1771c9e06bf9a
font_01_sfnt_off0000e85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85F 10508 bytes
SHA-256: 55cebb33b22fcefad95ae61c1dd46a4055a5823957e81ed9c5e282bd000d6da1

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