Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dad23a8a7bd6f7…

MALICIOUS

PDF

76.5 KB Created: 2021-03-12 15:37:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fb6abfac14fe9d759c76ed7adc5f30ed SHA-1: af63709444b9c3d74ea2d08d338f15f35d9bfd8c SHA-256: e2dad23a8a7bd6f7566444d32e88068b246b2a51083a10a21c72e7367d7a3aa6
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a phishing or scam attempt, indicated by the 'SE_SECRET_RECOVERY_LURE' heuristic and the presence of numerous external links, many hosted on disposable domains. The 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics suggest the document is designed to generate traffic or distribute malicious content through a link farm. The ML classifier and ClamAV detection further support its malicious nature, likely leading to credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://lozipotod.ru/award?keyword=networking+protocols+pdf PDF link annotation
    • https://wotuvakarebor.weebly.com/uploads/1/3/4/6/134665633/5284816.pdfIn PDF document text
    • https://funifagokose.weebly.com/uploads/1/3/2/6/132681236/natow_tubitagamozoz_nazutab.pdfIn PDF document text
    • https://vabakapis.weebly.com/uploads/1/3/1/4/131453405/f51d0d88f578b.pdfIn PDF document text
    • http://vowavosudepomu.iblogger.org/wivedezaserilazuf.pdfIn PDF document text
    • https://jumuwaxenu.weebly.com/uploads/1/3/1/4/131406560/gufowawiwoxafude.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/1053159.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/a1f17210-7bc8-4e93-aaf0-9b98b1f5dbb8/2017_subaru_forester_2.5_i_premium_standard_features.pdfIn PDF document text
    • http://kowaromeke.rf.gd/zutupexogexufime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d244434d-9c5d-4fc9-a013-7ee2efb447dc/fomexaraserufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cdad03e-f1c2-401a-9a3c-d6534d5ee18a/rififibojugitojukula.pdfIn PDF document text
    • http://zimopup.myartsonline.com/43926195815.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/a_dolls_house_movie_script.pdfIn PDF document text
    • https://59548cc9-d6a6-4b2e-bd73-2bfb7290c7b5.filesusr.com/ugd/3fd21f_ece624d82106495d8c86505dea6d1f4c.pdf?index=trueIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/bcs_result_2020_40th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c5f363-7119-48be-b7d1-3961ca014d09/logitech_mm50_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d40c3ed-e606-4894-a761-6fe5494efc02/chemfiesta_significant_figures_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f6ff664-da4e-495c-80b3-b42b62c1ec99/depad.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_4ed125b9c8e140f085baed7613949346.pdf?index=trueIn PDF document text
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_015e01fd78fd48098ba4e3c5e99230bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c97bc296-08ee-4a7c-bff9-37429042102d/toms_coons_mulattoes_mammies_and_bucks_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f8805f-5e2d-4125-9747-6c11cf312d9d/lg_wm2016cw_troubleshooting.pdfIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_0f6657f481e74a7ba73939c92e651497.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/519a7ece-f85e-4c20-9cc3-b2bf1a900a37/how_to_program_garage_door_opener_keypad_liftmaster.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_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 5240 bytes
SHA-256: ae21de187741b12b6687b28852b9357f156558e57f3c1795be9b29f481400ef0
font_01_sfnt_off000101f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F2 10176 bytes
SHA-256: 62d381a2c87480bc1ca550d6ec7b373e2fbf3f3cde8fd421023e49e26b004919

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