Malicious PDF — malware analysis report

Static analysis result for SHA-256 0331e97145579774…

MALICIOUS

PDF

85.4 KB Created: 2021-03-30 18:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5185a58a4fce0719be267e3ba3027807 SHA-1: 9cf82c1e585df0f8f312ca8fd45b85117e8f594a SHA-256: 0331e97145579774decbea897ed82b2f3a08bfb9b102a64a4dede13ffdb1f248
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.
  • 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://seumenha.ru/wix?keyword=apkpure+test+dpc PDF link annotation
    • http://world-wildshop.com/1984_chapter_7-8_questions_and_answersmotc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450415/normal_6041609eacc9c.pdfIn PDF document text
    • http://ontrade.top/find_my_phone_app_free_download_for_pcf3vis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464869/normal_60023b42929bd.pdfIn PDF document text
    • http://reassurez-moi-fr.info/shark_navigator_lift-away_pro_upright_nv356ee7hv8.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/gegulurirelimanivugoguoi5tw.pdfIn PDF document text
    • http://mkuu.club/flower_images_hd_wallpapers30cf.pdfIn PDF document text
    • http://doordash.link/gigabyte_z370_aorus_ultra_gaming_motc69m1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_602bdc5cc7013.pdfIn PDF document text
    • http://istra-backwater.ru/what_are_the_rules_of_the_game_of_life6s3hr.pdfIn PDF document text
    • http://dostafood.xyz/caller_id_faker_unlimited_credits_apudwav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369927/normal_5fc6a9304a293.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_c22497c69dab436793fff1ec7124dea0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/63962654389.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/denid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd2ab2e-1418-4048-9483-79f9f60212cc/pidelewojuwas.pdfIn PDF document text
    • https://3abcc933-4059-444f-8e65-7077e95f005f.filesusr.com/ugd/44645f_bed9e95c319b4ba199b00c7782d98993.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2f5157-bc15-4e3d-b074-8c1e52cf9c13/66480044940.pdfIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_8b14fc249c85456a89c6cda541e59c32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/bolujapijoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06534be-16b7-4749-9990-a279b5d89d1e/47070937207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/475d90a3-d0c5-454a-a8b5-2bcfcab1a737/cx_990_nordictrack_elliptical_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/all_the_birds_in_the_sky_sparknotes.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00012b2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12B2C 17816 bytes
SHA-256: 9a03c44fb6e51e268d37fac73222bd07e73efcd8a973206494d4f1d904ec459f
font_00_sfnt_off0000e0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DE 6060 bytes
SHA-256: 6bc864f51fa9ddf4aa318f009ee9dc958c901fb4739700c42915cfcbe35ffbf5
font_01_sfnt_off0000f60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60E 4880 bytes
SHA-256: e46de2678b6dbe600c41781955c86b261e948bd72709dad3c3cae931f83ae056
font_02_sfnt_off000106bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BB 10532 bytes
SHA-256: f110a142ecd616114892014da322f2c33cc7fde587cdcb4c03cf01006fa0e49e

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