Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35ea2980c8353c2…

MALICIOUS

PDF

73.5 KB Created: 2021-03-10 16:07:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5764dcc3a0914bec093270a11f74bdbc SHA-1: 79b6ce1e2000d5fc8c8ce077ec732d0043d7ee96 SHA-256: e35ea2980c8353c2e8a6bec11a5ad8ede67254f0d78e98ed4caadade32c3b0e2
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious workflow, potentially involving the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/award?keyword=calma+emocional+bernardo+stamateas+pdf+gratis PDF link annotation
    • http://setopin.mypressonline.com/sufawuvogonuv.pdfIn PDF document text
    • http://pugexemerupu.iblogger.org/97034858412.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/3781185.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/can_you_make_your_own_descaling_solution_for_keurig.pdfIn PDF document text
    • https://kumaradogutaf.weebly.com/uploads/1/3/0/7/130775833/3396949.pdfIn PDF document text
    • http://wavosebiza.22web.org/zaxexegi.pdfIn PDF document text
    • https://kuximakid.weebly.com/uploads/1/3/0/7/130739256/zopudesadinipu.pdfIn PDF document text
    • https://susatabunek.weebly.com/uploads/1/3/2/6/132695662/bowile.pdfIn PDF document text
    • https://pozimetotekiv.weebly.com/uploads/1/3/4/3/134339641/fitubimepote.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/sodebipixidef-didurevor.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/the_beautiful_game_podcast_hosts.pdfIn PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/xutera.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/bajasel.pdfIn PDF document text
    • http://zekamuwafevero.iblogger.org/wofotajulexalitapomume.pdfIn PDF document text
    • http://vowewudimo.mypressonline.com/vixezewibemabol.pdfIn PDF document text
    • https://nefupoxuwuridek.weebly.com/uploads/1/3/4/7/134747690/mimeseli.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/zoxezorafujazuwet.pdfIn PDF document text
    • https://musevurimimurom.weebly.com/uploads/1/3/4/7/134711136/7437ad9fbf89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buvodadixasiz.epizy.com/37222531631.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/72994544796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fda1dca-ef44-443b-9ba6-a7a1768d30bc/swann_wireless_security_camera_system_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30cdb7a-cbed-423e-affa-127068ca92c9/polk_audio_dual_12_inch_subwoofer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af5f0dcf-4cd5-4f52-aba9-5aab8b68e671/how_much_is_55_inch_samsung_tv.pdfIn PDF document text
    • http://nafaradevofipaf.myartsonline.com/62749272947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe26dbe9-7854-442d-a10a-e887d06ee5b1/bidomerowakozewa.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/jirejotizubidemozawumafuk.pdfIn PDF document text
    • http://faleferesevo.onlinewebshop.net/samsung_un65ju6500_manual.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_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 5520 bytes
SHA-256: 6df477982f5fea3ba3f97bcdc1543a1df5f7c69d6933b5594520d70d5fb171e7
font_01_sfnt_off0000f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF545 10248 bytes
SHA-256: 771012a41d8755caee4c12a025cfdf45448d87af4a2fa6ab7b5f5a9d29516e37