Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53d62682db00f82…

MALICIOUS

PDF

82.4 KB Created: 2021-05-12 12:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2e260dbc48ee4465e1b641119af7a73c SHA-1: 196854b4899176b90c2af97ec989be8e856ba9e5 SHA-256: d53d62682db00f821fe610ea6852a322c021c93d2abe3e74417225665ab3061b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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://resalured.ru/strik?utm_term=jardine+crib+parts PDF link annotation
    • http://floradoma.net/escape_room_level_51_to_100_answerzhyl6.pdfIn PDF document text
    • http://instapresent.site/vcredist_x64._exe_2010_freerh88o.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuxopova/2rrjfdh/totally_accurate_gun_simulator_script.pdfIn PDF document text
    • http://zekoselu.22web.org/36099295303.pdfIn PDF document text
    • http://newsportstechnology.ru/meilleur_antivirus_android_gratuit_2019_pour_tabletteoj8ie.pdfIn PDF document text
    • http://loveantravel.xyz/how_to_configure_cisco_wrt54g2agdov.pdfIn PDF document text
    • http://connexion-amelii.xyz/where_to_find_model_number_on_amana_dishwasherjjm3b.pdfIn PDF document text
    • http://pristav.pro/13893465135jqy57.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/jjjeS07/ub_learns_library.pdfIn PDF document text
    • http://studyweb.site/acog_task_force_on_hypertension_in_pregnancyibflf.pdfIn PDF document text
    • http://sepibuzare.22web.org/sasilep.pdfIn PDF document text
    • http://koreanluxe.com/850915040169vaj7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nedomovoguluz.rf.gd/13977662569.pdfIn PDF document text
    • http://nixawoxikoni.epizy.com/eduqas_a_level_physics_data_sheet.pdfIn PDF document text
    • http://zimunumiwu.epizy.com/62225450983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbe663e-68d1-4591-9aa8-1b9d8fe7a16e/pizonopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2bb1a08-415e-4814-b06b-e52d53be31ca/why_does_my_candle_flame_flicker.pdfIn PDF document text
    • http://jiwepatifon.rf.gd/dototibukop.pdfIn PDF document text
    • http://japixunatavaxi.rf.gd/10284989187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe4653a-ad74-40e8-9c19-bedfc6298a2d/vumobagavekawilet.pdfIn PDF document text
    • http://guwuwusiva.rf.gd/admission_form_2020.pdfIn PDF document text
    • http://muwalolerede.epizy.com/14497689735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9d5339-2142-491a-abad-940e09860785/how_to_not_be_codependent_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329221bc-bd29-4072-a4d8-9b3d1bb1f437/dajirawam.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_off00010478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10478 5164 bytes
SHA-256: a4ef1addb39930901d457375ad4d94c07509a364662ff455002e6c6579241a9d
font_01_sfnt_off0001160d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160D 11340 bytes
SHA-256: c5b0c9b7fa61792bc8dc3f4097c56f8811b50f5f937df302efa0b11b593e46f9

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