Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c000138316a86b…

MALICIOUS

PDF

70.5 KB Created: 2021-03-06 07:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c257cfe4950a3610894a5eb066423a19 SHA-1: 98435e0f11b4e01f215a757fbf71ae5abaa34a03 SHA-256: b4c000138316a86b5fd5b19db885a6967f6691ae2c6630bde1286abc1b2e3e32
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/award?keyword=sunbeam+oskar+mini PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449183/normal_5fe8c1790fba9.pdfIn PDF document text
    • https://roromitekavu.weebly.com/uploads/1/3/4/5/134528712/mujav_vibewomeg.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/5146978.pdfIn PDF document text
    • https://sufixekanol.weebly.com/uploads/1/3/4/7/134712322/8388208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5fd6b23f35c0b.pdfIn PDF document text
    • http://towizekotebe.iblogger.org/44707835764.pdfIn PDF document text
    • http://xufulop.iblogger.org/bavitadibosunifibijenan.pdfIn PDF document text
    • http://rilizikurejoru.22web.org/annamayya_movie_songs_com.pdfIn PDF document text
    • https://rozomibevepozif.weebly.com/uploads/1/3/0/7/130775668/xamasexoxun_bazogelumobemi_gisupemuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_5fd2179f78c6b.pdfIn PDF document text
    • https://nuresoxak.weebly.com/uploads/1/3/1/3/131380504/zezopipodezix-gejoxosop-samifenifedubix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492875/normal_5fef8e72a3267.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd63ea15-dca2-40bb-9a57-6becf50b9896/what_does_77777_mean_spiritually.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7adcbb-dc68-4ab3-8ded-7f6ac072492f/samsung_rf4287hars_filter_change.pdfIn PDF document text
    • http://rofukifunovobo.rf.gd/pa_pressure_waveform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f6773b-5a7c-4421-a714-bde74a263835/m_ti_khon_ngn_hng_ng__online.pdfIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_1edb0356c8584715ba3e08c1171af7a6.pdf?index=trueIn PDF document text
    • http://judilawazawu.epizy.com/xobujelewu.pdfIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_08a5fb10c7444e4e89bc257f0d0caa8f.pdf?index=trueIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_ed3ca7e0da7446a4aa02a08f026cb394.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b19a10b-6819-4a97-be67-cdc3f5a715a4/food_safety_class_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599c01a7-d4c2-458e-8062-f4766acc3512/35953286593.pdfIn PDF document text
    • http://vomogowejupilu.rf.gd/63547171194.pdfIn PDF document text
    • http://faxesago.rf.gd/wearever_pressure_cooker_seal.pdfIn PDF document text
    • http://kelawezup.rf.gd/rogekobesugabekidomumit.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_off0000d730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD730 5108 bytes
SHA-256: 4b7dc65fe2e47eaf83d12d0f4bb6d585b41b38a445a299db7a30800f5653fa6a
font_01_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 11652 bytes
SHA-256: 1aa38d47de6ed5dbe2361b1f7e554b2718ae072896fb9374d643c96e4d0067ba