Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b497d131d879a3…

MALICIOUS

PDF

80.0 KB Created: 2021-04-06 09:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ae703530c79e82bc21107619f19e6c49 SHA-1: 11bf2fd6bddeddaa3b0df73d1e9504f45795f89b SHA-256: 97b497d131d879a314a5239e24d4caedbdaea95068420b4dab7e4661189ef989
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://vilenefex.ru/aws?utm_term=intertherm+hot+water+heater+elements PDF link annotation
    • http://dipazekonowa.mypressonline.com/mozadedefirilutexurixa.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/ggRZ1jb/nulajipelexe.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/aiean9Z/febudub.pdfIn PDF document text
    • https://kimimidinom.weebly.com/uploads/1/3/1/4/131453749/494b9f72360.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/20060587439.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/how_to_connect_directv_remote_to_onn_roku_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/GiibPia/pipimoguvefufefowasemej.pdfIn PDF document text
    • https://dajikapepexav.weebly.com/uploads/1/3/4/5/134597014/3340436.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/abbyy_transformer_2._0_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/k7qlsib/buggy_rc_car_brushless.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/cardiovascular_system_notes_anatomy.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/dujjjta/dish_anywhere_app_on_firestick.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/v_for_vendetta_coronavirus_mask.pdfIn PDF document text
    • http://tigagatu.atwebpages.com/louisville_attic_ladder_installation_instructions.pdfIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_4dc33db2c5574eb5921332a6b4bd61c5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3c74c7-37f6-4c17-9511-4ba7f0710069/bose_wave_radio_cd_changer_disc_error.pdfIn PDF document text
    • http://pofitubawonu.atwebpages.com/marketing_journal_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063d8ad9-07ea-4fe6-ab72-0623f6bd427f/qu_significa_lucha_contra_los_molinos_de_viento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f48b30-a94d-48b2-9db7-c09679632a9a/xolevomuximadumagev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/785f3345-bb46-4a9d-8d65-d8bc365d68f5/59709674792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e02173-7230-4bf1-8630-d0f285ca3079/74380980589.pdfIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_5cb204823ca64e44bb3fedfe89ac2aa0.pdf?index=trueIn PDF document text
    • http://rosajeku.myartsonline.com/54195097173.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_ba9e53915d644b548897bfa3ac974986.pdf?index=trueIn 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_off0000fa95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA95 4952 bytes
SHA-256: fea84508871b243ff8bf6343ac3b2c406d7d71f5eab1bd8354d9687e6f552b0c
font_01_sfnt_off00010b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4B 11952 bytes
SHA-256: b0553491e87c6c1db1279406a3408393abc024ff76d76332185157e64a1d182c

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