Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ea0a323b6eb9e2…

MALICIOUS

PDF

102.3 KB Created: 2021-03-11 21:56:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1c980fd6b5d949aa54a054fe096171a5 SHA-1: d06883a9a41fa525b9fa030aa4ad6ff94eb894ad SHA-256: b6ea0a323b6eb9e2b7b70c4258ef0084c34b62b13ad285f69dcd07c047624656
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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://golowaki.ru/award?keyword=assumptions+of+dependency+theory+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480898/normal_5fce17ebe596f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_603e2f8877e6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463559/normal_6039f7c2a9407.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/search_bar_google_chrome_delete.pdfIn PDF document text
    • http://nunesop.scienceontheweb.net/baby_bjorn_travel_crib_vs_pack_n_play.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/sears_5hp_chipper_shredder_manual.pdfIn PDF document text
    • https://talovilivakalod.weebly.com/uploads/1/3/5/3/135326419/zisagiba_poberukeladuk.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/23105071211.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/3bc527d0e474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_6024a88aa50e0.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/elements_of_music_emo_rap_download.pdfIn PDF document text
    • http://weridif.medianewsonline.com/98893257646.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375503/normal_6007aa89b0ba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483097/normal_60232dd19b6c1.pdfIn PDF document text
    • https://biwimukapol.weebly.com/uploads/1/3/1/3/131398517/jiwawukozudekexiri.pdfIn PDF document text
    • https://vekoduxiboba.weebly.com/uploads/1/3/1/3/131398498/3457789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458856/normal_5ffa77f55d4ee.pdfIn PDF document text
    • https://vuxulirupam.weebly.com/uploads/1/3/5/3/135346280/sawijodukejisiv.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/xasovewipeje/bryson_tiller_don_t_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/sadaw.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/apricorn_aegis_padlock_drive_manual.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_off00015590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15590 5244 bytes
SHA-256: 6e8bbf0efd93de21bad79547264b71ed4c38b2a5229d01b3b30a8bcb3bbb5eaa
font_01_sfnt_off0001674d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1674D 10720 bytes
SHA-256: fc8b72fb9c4d39132ee55cf4a6d77f6c1d7ff81b0da7a56fc2999108d2c7dd98

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