Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f40b0a4246c8dd…

MALICIOUS

PDF

79.0 KB Created: 2021-04-04 15:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 35ae192b746ff860380094be3796a0c5 SHA-1: bd3a727607baeff5b0b79d85db84fc2cf98b01b5 SHA-256: 07f40b0a4246c8dda3bcd67163fc22fbe016e85e3f3d8603453aa40904696dfc
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including suspicious domains like golowaki.ru and lapitubemexidi.mywebcommunity.org, which are indicative of phishing or malware distribution. Heuristic analysis flagged the PDF as a link farm on disposable hosting and a potential phishing trojan. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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=bottega+del+caffe+goldoni+pdf PDF link annotation
    • http://lapitubemexidi.mywebcommunity.org/18490356576.pdfIn PDF document text
    • http://damewonuseba.sportsontheweb.net/58553412070.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/jamawolazuzas.pdfIn PDF document text
    • http://ru-dev.xyz/toro_string_trimmer_manualxpq26.pdfIn PDF document text
    • http://hristogrigorov.com/devi_bhagavatam_telugu_freeleamr.pdfIn PDF document text
    • http://heartcenteredequestrian.com/play_free_games_online_without_ing_gtafo6oh.pdfIn PDF document text
    • http://tadefog.medianewsonline.com/89387456864.pdfIn PDF document text
    • http://good-production17.site/how_much_does_a_general_manager_at_chick_fil_a_make190e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451941/normal_5fcd505c59493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_603eea95d2c4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409806/normal_5ffbdb5dc2a10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_6040dca3e3b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_601cd8743be13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_7a31cf7a78a944fc81a136a884414a68.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_51e005f028d040ba82add822e271a2a6.pdf?index=trueIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_e2b97a836a54487a886edccd66b36734.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_8247d6bdbf094619b66c78f341e0511f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f037cf-131b-4f8b-bc9a-54392a16ee38/76211426038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7fed6e-5283-4430-9825-1bfbb6f29a86/94371155535.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_ac1149445b614f40957230b1d9931516.pdf?index=trueIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_adef790f704c4f72ac25dc8c39cf97e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e09389e-cde0-42b7-b147-9a2b6185bb2c/77428660295.pdfIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_0668c201012b4acbac219634b1deae60.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/578b0f2e-8ffe-4148-bde7-09feb32a631f/how_to_fix_my_ge_microwave.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/xoguxo.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_2179693fc4df4f21a10a891b6714e7bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c74677cd-c91a-41dc-ad81-455fe6ddb402/what_should_a_7_month_old_be_doing.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_off0000f668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF668 5096 bytes
SHA-256: a95beec02aeb6ed935860e5f90d27076c9e3dbaa508d2cdbd2106de0dc2893fb
font_01_sfnt_off000107de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DE 11908 bytes
SHA-256: 1eba541756415ad6036c2cde8798960a4af86f90db2d906f8f9a68d899e04137

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