Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7b64c299660dfe…

MALICIOUS

PDF

77.9 KB Created: 2021-03-29 00:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c7dcee9f61d93c89a10b3cbacc441b6c SHA-1: 51e97bb6d738cde07263d040179fe44d7caf69a0 SHA-256: 0d7b64c299660dfedeed9165441d40b9404de1677372cbfa173ce019c0327b45
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 0.9993

Heuristics 5

  • 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 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://jumiwimov.ru/strik?utm_term=is+washington+state+moving+to+phase+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481161/normal_60548205466af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412415/normal_6012a4691efc7.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/gdSqSic/xolunujex.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/Kejehhp/que_funcion_cumplen_las_papilas_filiformes.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/iiPMgjH/japaramo.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/6rkjcor/bitmoji_classroom_tutorial_schoology.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/giReAXH/secret_society_hidden_mystery_game_updates.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/identidades_trigonometricas_pitagoricas_reciprocas_y_cociente.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/grammaire_francaise_en_ligne_exercices.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/bupa_ambulance_claim_form.pdfIn PDF document text
    • http://zodimasar.mypressonline.com/is_naclo4_an_acid_or_base_or_salt.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/6hb7YTZ/field_hockey_lessons_for_beginners_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366652/normal_5ffa156c5ccf3.pdfIn PDF document text
    • https://cdn.sqhk.co/lomekojop/6iirifz/tor_browser_linux_command_line.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/dbicLii/85048235492.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465390/normal_5ff142f724719.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/gFhhS0o/land_rover_defender_2018_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416666/normal_602a6dffeebf5.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/jbl_basspro_sl_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/spaghetti_tower_challenge_ted_talk.pdfIn PDF document text
    • http://xevijojikutep.onlinewebshop.net/formative_assessment_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/fabemubevifixinugipage.pdfIn PDF document text
    • http://zasuwunal.myartsonline.com/tipos_de_medios_de_comunicacion_no_masivos_wikipedia.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_off0000f324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF324 5324 bytes
SHA-256: 5ae4290fd17d796bfe51982da658059b039f26a9dfe451dc31a8a808d9071597
font_01_sfnt_off00010540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10540 10788 bytes
SHA-256: 815dea9d8120f966e5dc45d5025e2a1996fd439d0ccda45f8738e874cb616727

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