Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ce4fd1041a62ae…

MALICIOUS

PDF

95.1 KB Created: 2021-04-05 11:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8024a249a0c61a4eedb39f1daed72ded SHA-1: 76569fb3809f2e5f91dfadd29c0ea42ce32c6e3b SHA-256: 57ce4fd1041a62ae9e457d66d59d2d52ffca1c13cc5502779bd0e557ffea41d0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to attract traffic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://botokaw.ru/award?keyword=aug+current+affairs+2020+pdf+bankers+adda PDF link annotation
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/pifarivilud.pdfIn PDF document text
    • https://pivakezajategag.weebly.com/uploads/1/3/4/6/134605748/b866f.pdfIn PDF document text
    • http://lotobajigufar.mywebcommunity.org/benchmarking_book.pdfIn PDF document text
    • http://wulurag.mygamesonline.org/apostol_calculus_vol_2_download.pdfIn PDF document text
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/togawer_vubibujiwaxe_lobevedemarimir_joluz.pdfIn PDF document text
    • https://cdn.sqhk.co/norejasiwiza/djfhb9g/tip_top_video_download_free.pdfIn PDF document text
    • http://tipijijajofupi.sportsontheweb.net/43024087840.pdfIn PDF document text
    • https://sojoxatufuwi.weebly.com/uploads/1/3/4/7/134710771/genoxafijo.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/gcnhdGI/puppet_pals_mysterious_ticking_noise_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/Vbmiehe/3701683278.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokoze/cuhcehe/beat_hazard_ultra_apk_mod.pdfIn PDF document text
    • https://fafetomipisiso.weebly.com/uploads/1/3/4/6/134603542/jemolanasoxexuposufo.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/de37f1d1f.pdfIn PDF document text
    • https://vakilelem.weebly.com/uploads/1/3/1/3/131379598/mixudolonifonizo.pdfIn PDF document text
    • http://wobixoka.66ghz.com/88551516743.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://laletanegimiw.epizy.com/graphs_of_functions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/631d4086-a9ce-41b2-930b-8ceb30fedb1e/wudagesovunowujebuvopuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd14007-6b1c-4147-b553-c006ad8ff8d2/haier_hpd10xcm_portable_air_conditioner_10000-btu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c9dd449-6abb-4ebf-86c9-e6a718d94f49/what_are_some_physical_properties_of_seawater.pdfIn PDF document text
    • http://mafevela.rf.gd/lcm_examples_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb373ef0-2a9c-49fd-a158-1537f9aa9d96/74513677683.pdfIn PDF document text
    • http://wonetone.rf.gd/how_to_use_afterglow_headset_without_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad08b914-af0f-457e-a99b-1e3ac98acf31/fojepalebebo.pdfIn PDF document text
    • http://kenugaderagof.epizy.com/fobusejabaromupuzule.pdfIn PDF document text
    • http://vekisofekibote.myartsonline.com/third_conditional_exercises_esl_library.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFE 5760 bytes
SHA-256: 79b22ec442f98c93222796a378e163194d15024bb3422fb8be69b3bc329c82c2
font_01_sfnt_off000102ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AE 20892 bytes
SHA-256: c3405e3c56388e5dd08e0c0064ce587d6c1af0a9b72bc7e0523472d48e8d9cbb
font_02_sfnt_off000132d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D9 11040 bytes
SHA-256: dca25a7b3057bad3948f1fc3a9dafbd8efc41536930ce7b835a1ec4420eb25fb
font_03_sfnt_off00015893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15893 16172 bytes
SHA-256: 7f268005b80ff82e89639affb95403f55eddb42516abbde6a76e27226db124cd

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