Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee47ce5fb957199…

MALICIOUS

PDF

84.5 KB Created: 2021-03-30 08:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1bd4e6ae4917b593fac68bc48111c3be SHA-1: 801efea4a7aa080505f2ed2d6fe77aab561d134e SHA-256: bee47ce5fb957199c877cda57766266de74db9f4c77ad6e74b60a19662af50f3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs that redirect to other PDF files or potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a technique to distribute malware or conduct phishing by overwhelming search engines with links to seemingly legitimate content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/123?utm_term=english+action+film+free PDF link annotation
    • https://cdn.sqhk.co/lopumilekana/fhbJthh/cannondale_x_palace.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/fhhb9hf/xesetasorivikapo.pdfIn PDF document text
    • http://vuwiwetidajin.mywebcommunity.org/bed_psychology_books_in_telugu_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502248/normal_5fee274f360fe.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/mepeki.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/ijeYggp/uncrowned_queen_book.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/N7jcsBg/merck_kgaa_corporate_responsibility_report.pdfIn PDF document text
    • https://cdn.sqhk.co/duwewofowus/RP1FAtk/pixel_force_2._4._4_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_600dc65445d0d.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/gdI4WZJ/kim_kardashian_hollywood_game_baby.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411220/normal_5fe9138b283dd.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/qhgigKr/spin_the_wheel_numbers_1-_50.pdfIn PDF document text
    • https://zapamapat.weebly.com/uploads/1/3/0/7/130775391/vatirowomebasagof.pdfIn PDF document text
    • http://kuzososo.mygamesonline.org/automobile_engineering_ebook_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_5fd254bc7c810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_604d44a81bcfd.pdfIn PDF document text
    • https://vebodejivab.weebly.com/uploads/1/3/2/3/132302978/8532281.pdfIn PDF document text
    • https://kokesekodabese.weebly.com/uploads/1/3/4/0/134012443/5877253.pdfIn PDF document text
    • https://gupebuxoguwev.weebly.com/uploads/1/3/4/3/134381402/pekijibowir.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/cjfjbje/equalizer_bass_booster_and_volume_booster.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/aif5mjf/zekosebe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_27b74ee6bfc84f849a230f487adaa10c.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_c63be05c79044cb78c887e5da0303af7.pdf?index=trueIn PDF document text
    • http://binuwuzipu.myartsonline.com/filtre_quartz_mac.pdfIn PDF document text
    • http://rowoniwetob.atwebpages.com/bodyboss_method_chomikuj.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_a5cdcb8611494849a22d966a637f5844.pdf?index=trueIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_00dfc28c323845f6b9d0127f9d7842ee.pdf?index=trueIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_ae78cce63791441a911aa0cf9a97f200.pdf?index=trueIn 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_off00010c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C44 5252 bytes
SHA-256: 72bc67f9a5088ada7de57c3d7f9d2d51e2bf1787e88546edcfe944f9d3d5f72d
font_01_sfnt_off00011dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFD 11296 bytes
SHA-256: 2157c952abb14c000c704f0aef0385e5773e79b10838532f8e4357b800232ecd

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