Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1f17db0a7e983b…

MALICIOUS

PDF

103.7 KB Created: 2021-03-12 15:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 41446e266537ab92f2dc052acaffb48f SHA-1: 7493ed7dbc68141b373d16d47d3d5d4b7495eb21 SHA-256: fa1f17db0a7e983b91d847787a80363e4a309e1ea556d1d5c8a449688b253b42
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic explicitly flags it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and embedded URLs suggest the PDF is designed to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/award?keyword=battersea+power+station+history+pdf PDF link annotation
    • http://afracheat4.xyz/26074689197c08bc.pdfIn PDF document text
    • http://appless.space/wesoxezoxuleliluwedwv65.pdfIn PDF document text
    • http://ita-talia.fun/free_short_love_poems_for_him_from_the_heartumaz8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_603887ae6ccf0.pdfIn PDF document text
    • http://triple-doska3.club/assam_police_contractual_answer_key_2019dct7q.pdfIn PDF document text
    • http://wojurimaxab.mywebcommunity.org/types_of_bilateral_tubal_ligation.pdfIn PDF document text
    • http://steblin.pro/tamil_letters_worksheet_for_grade_1wdx35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485809/normal_60243a529f4c6.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/reguv.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/the_house_with_a_clock_in_its_walls_2018_trailer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476420/normal_600a542499430.pdfIn PDF document text
    • http://hookup756.fun/media_player_classic_apk_for_androidd6kpr.pdfIn PDF document text
    • http://lovelyhouse.online/how_do_i_reset_my_garage_door_opener_after_power_outagepdsxp.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/the_most_played_song_in_nigeria_now.pdfIn PDF document text
    • http://dihtyar.online/disneyland_closed_until_2021ag6ys.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/sixobuwesotilowapobati.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/8db4ed30-055e-417a-8486-9888ca9e57d2/26135839963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b406b4a6-fcb6-4a99-9246-ad4e00c03c75/gudezezukatobufewe.pdfIn PDF document text
    • http://woxesizefibugel.atwebpages.com/business_management_study_and_revision_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc42e664-3804-481d-aa22-65614f72e04f/how_to_hook_up_a_polk_psw10_subwoofer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a3068f-52e5-495b-9b16-fdd2b536b0bc/how_to_kindle_fire_7.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/mini_dachshund_for_sale_naples_fl.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_off000158ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158EC 5340 bytes
SHA-256: 29790b3cbe851afcfb6e407e389243689433619e245dd790df68f23616e9c615
font_01_sfnt_off00016b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B2E 11412 bytes
SHA-256: 7898965a88fbdf0c09916a8d7ffd77ad4a98748aeccb39fd25b65c1ff5d1c803

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