Malicious PDF — malware analysis report

Static analysis result for SHA-256 571972fe51c682a6…

MALICIOUS

PDF

83.8 KB Created: 2021-03-22 00:21:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d8934c3356125d6cc2eb0eaa680f473c SHA-1: 97371c27d8a5b1d0aee16d9751f0474a6721933b SHA-256: 571972fe51c682a669e1f669a3a706691da07826f954bd4726cde5e98b4a09f5
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://xezojetit.ru/wix?keyword=younger+next+year+journal+pdf PDF link annotation
    • http://evilcheats.fun/read_movie_screenplays_online_free237qo.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/63042283921.pdfIn PDF document text
    • http://zitarekatinupas.sportsontheweb.net/25475081293.pdfIn PDF document text
    • http://mebovaduzi.mywebcommunity.org/40646274260.pdfIn PDF document text
    • http://shopeuro.pro/75399146159m31x9.pdfIn PDF document text
    • http://sifuzifixezija.medianewsonline.com/free_printable_abacus_worksheets.pdfIn PDF document text
    • http://formverifiedbadge.com/hand_tossed_premium_pizza_domino_adalahfoate.pdfIn PDF document text
    • http://moxegelubopidi.sportsontheweb.net/totaxon.pdfIn PDF document text
    • http://aires.fun/what_is_d.f._in_statisticst0f5u.pdfIn PDF document text
    • http://ru-payment.casa/baby27s_day_out_full_movie_hd_1080p_download_in_english98lyc.pdfIn PDF document text
    • http://srakan.space/kelly_mcgonigal_the_willpower_instinctlamgr.pdfIn PDF document text
    • http://br1.red/what_happens_at_the_end_of_watchmen_comicd16dl.pdfIn PDF document text
    • http://ueuniti.xyz/johnstones_masonry_paint_data_sheet6j407.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/an_introduction_to_mathematical_statistics_and_its_applications_solution_chegglhb3b.pdfIn PDF document text
    • http://bawazofo.getenjoyment.net/60141867809.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_e0187e00a3b2458d9d59fcd6a4c2e97f.pdf?index=trueIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_04e407a99b4c4977802b225282234f52.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_54c11e2d6d764898adb7a6ef0d1e1650.pdf?index=trueIn PDF document text
    • http://vewawisu.onlinewebshop.net/dajemafaxemegigisogeda.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_2773a5338f8b4f04bcf2cd91a02de8fc.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_55dfdeb8e4354030bf0aeb6a26a921cb.pdf?index=trueIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_b999a7ec673a41afaa3d46a35f29e1f5.pdf?index=trueIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_ee818052ac1645b79460174f1c0624a1.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_974790ad90aa405eba719952faa3495c.pdf?index=trueIn PDF document text
    • http://xiwozoget.atwebpages.com/27123873069.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_faa0414fe5214eab95ebc683f2d30ee9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC55 5072 bytes
SHA-256: 85bb1948b0743f288659c4d68c147a5f37b033a74e3e92bb1d7be870325b461d
font_01_sfnt_off00010dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBC 10816 bytes
SHA-256: 0fe207eb969ae49b46886aa06c38ed0f6e3ae9d290233087d5bdf1ac74f8d704
font_02_sfnt_off000132e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c