Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbb5e33e2b1480a…

MALICIOUS

PDF

96.7 KB Created: 2021-01-21 12:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8fb124f8459b05e93931f727c655cbed SHA-1: 80bccb5a0d6078ee66ef439b275a1bdfc80261df SHA-256: fcbb5e33e2b1480adfeae491b9fa520cdefb1a2dd0afce2e00779c371bf49690
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to a malicious website, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/aws?utm_term=bounce+dryer+sheet+coupons+printable PDF link annotation
    • http://xabidewukolesas.66ghz.com/bee_bot_app_for_android.pdfIn PDF document text
    • https://konizalo.weebly.com/uploads/1/3/5/3/135388679/fexepatujoxepuw_gowabumibow_gelogene.pdfIn PDF document text
    • https://site-1204352.mozfiles.com/files/1204352/zulanuvetodurevafewebu.pdfIn PDF document text
    • https://site-1176998.mozfiles.com/files/1176998/5_star_day_nursery_ofsted_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_5fafd1634b27a.pdfIn PDF document text
    • https://site-1168038.mozfiles.com/files/1168038/wevodetujuzadifipin.pdfIn PDF document text
    • http://xawinagolagiju.iblogger.org/naruto_fight_shadow_blade_x_free.pdfIn PDF document text
    • https://vobasonuniba.weebly.com/uploads/1/3/4/6/134668907/6f6bd65be22.pdfIn PDF document text
    • https://site-1171686.mozfiles.com/files/1171686/ps4_emulator_for_android_apk_offline.pdfIn PDF document text
    • https://sogifeni.weebly.com/uploads/1/3/2/7/132712483/tarod-gaxomijawuxuziz.pdfIn PDF document text
    • http://nokutanebufevon.iblogger.org/another_eden_first_encounter_summon_guide.pdfIn PDF document text
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/18b4f699c99.pdfIn PDF document text
    • https://vigakamodibit.weebly.com/uploads/1/3/4/7/134770941/pilididog.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
    • http://rokafexoxo.epizy.com/52735437755.pdfIn PDF document text
    • http://bokonejedebi.rf.gd/sap_hybris_commerce_accelerator_data_sheet.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/crystal_reports_viewer_version_8.pdfIn PDF document text
    • http://wafubarig.epizy.com/free_online_editor_chrome.pdfIn PDF document text
    • http://kejefutipetube.epizy.com/amman_bakthi_songs_masstamilan.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001201a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201A 5332 bytes
SHA-256: 3a529009648cb84ca0d352b5b52b60b65fca7bfd9971c7cffd152c9134756190
font_01_sfnt_off00013225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13225 3044 bytes
SHA-256: 56cb7d5e7d2cb08e25acb0d6d51e45bd249190bc1d63122a4e52404a27f3cacc
font_02_sfnt_off00013d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D43 12284 bytes
SHA-256: c4712ff53245117c5f680b72356cab4e7846fdc38944c1b4220463873c6b67b7
font_03_sfnt_off00016682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16682 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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