Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a71bf5efd516670…

MALICIOUS

PDF

78.0 KB Created: 2021-03-23 14:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 71b1e0bac475932522c6b2e009a1f84a SHA-1: 2597085826a6c94daa4b41cec3d58bf39714b7ee SHA-256: 0a71bf5efd5166704aa959e232e690493c5394234bb659a18bfe373b780c8c3b
134 Risk Score

Malware Insights

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

The PDF file contains a link farm and a lure for a "movie free download", which is a common phishing tactic. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL `https://maypoin.ru/strik?utm_term=the+missing+2003+movie+free+download` is likely the primary malicious payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://maypoin.ru/strik?utm_term=the+missing+2003+movie+free+download PDF link annotation
    • http://pexarinolal.mypressonline.com/21539745565.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/zusumezivipudilugonesepu.pdfIn PDF document text
    • http://xilatotes.sportsontheweb.net/kalender_2020_indonesia.pdfIn PDF document text
    • http://crubr.space/zolajusonv7gb9.pdfIn PDF document text
    • http://piredvizhnik.com/3356199187313icx.pdfIn PDF document text
    • http://prodive.su/gambero_rayleigh_menu644i6.pdfIn PDF document text
    • http://misstourist.info/15988064369hlt0a.pdfIn PDF document text
    • http://zebrait.fun/basic_barbell_training3tmw8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/34767e55-27a4-45fe-bb15-4843df7013d2/how_do_humans_adapt_modify_and_depend_on_the_environment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3b6d1d-b5b4-4548-a60b-82bcc7b5cee0/how_to_see_review_pictures_on_dhgate.pdfIn PDF document text
    • http://jewofeket.onlinewebshop.net/83280163973.pdfIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_20bf1538459b45e9a1c748caf5fac779.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/2542482993.pdfIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_81fbd14cd73a4a43ac7822c3a7cddaa2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffdae3d9-3348-4763-bdfb-c99be72a9557/25531466409.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/punctuation_marks_and_capitalization_worksheet.pdfIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_6ae1f41541ec40f29a0fa3983b91685b.pdf?index=trueIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_cc96438daa3a4788b9b887c9c860922b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/mu_slide_p_min_ph.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/oogway_ascends_sheet_music_cello.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/36873415002.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_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 5860 bytes
SHA-256: abe5ddd2088a0860f33f41a3906700aa50ffa947b5309a3ec7b5acf568890d30
font_01_sfnt_off000105c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C7 10648 bytes
SHA-256: a1d5219df3ef1365a58926e61ffca272ab2414c287dca9421bc6d88a1b7b1cde

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