Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f5a25f15f4067c…

MALICIOUS

PDF

81.4 KB Created: 2021-04-05 21:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2b529fa4b2d9d976bfedcda6839bc53e SHA-1: 43e33c4a20617284b9646195999370d1a69f0aeb SHA-256: 00f5a25f15f4067cad46e82bd902121736fcebcc12e59b031c947a0e23f72e02
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed for spam or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/wix?keyword=verbs+starting+with+em PDF link annotation
    • http://zekaxezixil.medianewsonline.com/directorio_del_gobierno_del_estado_de_guerrero.pdfIn PDF document text
    • http://xosubowavenu.mypressonline.com/types_of_genetic_disorders.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/fowaporobowawiki.pdfIn PDF document text
    • http://fizebiredasibi.mypressonline.com/gagifepo.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/access_control_system_book.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/47023439369.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/16158650117.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zidosozawok/72702659477.pdfIn PDF document text
    • http://vawanumezal.onlinewebshop.net/56452125175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc28ee4f-d885-4bee-bea6-794550f30bb9/how_to_approach_conflict_resolution_in_a_relationship.pdfIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_d25b287d1c3748c2a33d919858052d33.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazixipame/great_writing_4_great_essays_free_download.pdfIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_0267459112d84c60858880192be3c6aa.pdf?index=trueIn PDF document text
    • http://mixezized.myartsonline.com/52159843019.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/porakixawimofinubogukit.pdfIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_faa554e944e94ae5a4cdb066fd1832d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovilowab/the_brightest_stars_anna_todd_espaol.pdfIn PDF document text
    • http://wurebosuloxu.myartsonline.com/vedinulezowur.pdfIn PDF document text
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_de7dda8cf7e740aa97dd907baf16bb24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8287c791-462f-427e-b138-b11c2c8c9fc1/61995992458.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 4940 bytes
SHA-256: 902234de090e3210046b70695f6c10fda993cd4d4d38e09ec46ab48ba1086e43
font_01_sfnt_off00010487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10487 11112 bytes
SHA-256: 3f745e8b3b126f8e48b6614663e0cdb2280584b9c99be5d2f5b57797c3e7547b
font_02_sfnt_off00012a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A76 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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