Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b1390e6c20283f…

MALICIOUS

PDF

76.4 KB Created: 2021-03-14 03:31:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 16708d0ec86f09d60544ced8642deab2 SHA-1: c2a57541b314642aca784cd3663dccc3cff412c8 SHA-256: 15b1390e6c20283f1a8255e6209df17f60bd8ac4b80c9aac0bc0857629f7aa1f
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an external URI pointing to a suspicious domain, likely used to host phishing content or download further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is part of a network of disposable sites designed to attract traffic, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/award?keyword=online+business+in+nigeria+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413016/normal_6007c305bca72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_6047139b87d17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_6010a978ab6c5.pdfIn PDF document text
    • https://sugovodeko.weebly.com/uploads/1/3/2/6/132681033/e9d4dec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409801/normal_6042192bd7840.pdfIn PDF document text
    • http://vitalia-transports.com/geometry_5._8_worksheet_answer_keyo1m9i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413111/normal_5ff98be8a22b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481168/normal_5fe9c7b419d57.pdfIn PDF document text
    • https://fapojenulexo.weebly.com/uploads/1/3/1/3/131383319/2145620.pdfIn PDF document text
    • http://verification-help.business/pumagelejajovewobamip5aqyu.pdfIn PDF document text
    • http://cheapestshop.xyz/dave_ramsey_financial_plannerrzkm1.pdfIn PDF document text
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/wozusibozekod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476011/normal_5fe3ae6fccc2e.pdfIn PDF document text
    • http://neo-tp.ru/is_percy_jackson_sea_of_monsters6g6kv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401525/normal_5fdda3726f617.pdfIn PDF document text
    • http://giocodigital.website/full_oxford_dictionary_downloadxg5zx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_600be17280f14.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/jitimesolagun/jigiluzasizakorarerafor.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/cidco_online_lottery_application_form_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f27636-f639-43ca-a613-028c58188856/prophetic_intercession_scriptures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe5de11e-6381-4270-b1d6-665606ea1886/tp_link_av500_2_port_powerline_adapter_with_ac_pass_through.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98ca111-3034-4a1e-a768-78272f867dff/walmart_black_friday_2020_hours_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/trendy_versatile_coming_soon_template_nulled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5473ed7c-af1e-453e-a24d-d01c8338a434/what_does_the_name_dos_equis_mean.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_off0000ee4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4A 5376 bytes
SHA-256: 64bc5f9db4feb6fb160cfb201cbfec706978b03fcfb3c629ee9d2247126269eb
font_01_sfnt_off00010095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10095 10472 bytes
SHA-256: 20c7061dea1a829b0926b701a6e120ed5c227434d8d999e65584aba8023faf8b