Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f986836a25c3bb…

MALICIOUS

PDF

191.0 KB Created: 2021-04-12 10:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dc5e2418b68c221dbe597b31b4f800ee SHA-1: 9d19ef831f4a2d801e0c4ecea78af1d585d2d742 SHA-256: 70f986836a25c3bb6927b6bd66e89c552d923eebdf53b0a9d64539b5ee56c45f
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=the+lives+of+a+cell+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464720/normal_606a93dab81ed.pdfIn PDF document text
    • http://rejamar.sportsontheweb.net/tower_crane_hand_signals_chart.pdfIn PDF document text
    • http://bexowobiminefi.mywebcommunity.org/89960397498.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/laxok-kozerekopogobi.pdfIn PDF document text
    • https://nojabepeteguki.weebly.com/uploads/1/3/4/6/134669956/e141cb42ada.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/58002712688.pdfIn PDF document text
    • http://zosuwalerikare.getenjoyment.net/ages_and_stages_questionnaire_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_601b8c4608ccd.pdfIn PDF document text
    • https://gedinabudi.weebly.com/uploads/1/3/0/8/130814056/gudotafiw_misatijarid_vopagi_redotiti.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/texodoveloduwupivijazitiw.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/25ee746d-d160-4d10-981b-09623ea8efeb/fesigopilozaxe.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/62373561590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dcea436-bfd8-4cbc-a0d2-2371f91c5f6b/list_of_surahs_in_30th_para.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4fdcd9-1a6c-4632-b827-2ebf20fd42cf/call_me_by_your_name_online_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e01a374-7f98-4b42-86c1-27225afc36bc/far_from_the_tree_documentary_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9756a015-7bc2-462c-b1f0-8f9fc0f3bd52/wivevaxum.pdfIn PDF document text
    • http://wugerubuvugox.myartsonline.com/80695356429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15a91dc7-e7fa-485d-b01a-c70fa98d868e/pitalulisapas.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/realism_and_naturalism_in_english_literature.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
stream_002_off0000ef92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEF92 154852 bytes
SHA-256: a437acac36a064f64864570736b5a330f592e2cd06c2ce4d830ebff8753bc566
font_01_sfnt_off0002b777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B777 5084 bytes
SHA-256: f620afe0a4573b5464c77aae35a0cb69ecdfcb2ec109e72d34326a643f55143e
font_02_sfnt_off0002c8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C8D0 10636 bytes
SHA-256: 5aba5353c81888f4d6a12dbc8c7701ea14e6b85248a5698d062cc30d924a9e7c

Open this report in the interactive analyzer, or submit your own file for analysis.