Malicious PDF — malware analysis report

Static analysis result for SHA-256 30db27bde3c8a616…

MALICIOUS

PDF

92.6 KB Created: 2021-03-14 13:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ed367748c7f7bc270440e68a2f36b31b SHA-1: 82dac606a2098dce11c82f2321fff5ed7e8b8bc0 SHA-256: 30db27bde3c8a61645ed673871e1aee07b878554203a907e3a7066c6f698cc44
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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.
  • 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://gimoguvi.ru/award?keyword=african+society+and+culture+pdf PDF link annotation
    • https://medogizelolu.weebly.com/uploads/1/3/1/0/131070938/sugobuzegefu.pdfIn PDF document text
    • http://yewes.space/60871538881ujj2b.pdfIn PDF document text
    • http://br1.red/resume_template_creator_freekk8on.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/wujibexopo.pdfIn PDF document text
    • http://lezigawojubitok.iblogger.org/bonnie_bainbridge_cohen.pdfIn PDF document text
    • http://motivawka.online/what_is_an_llc_for_dummiesfn9sv.pdfIn PDF document text
    • https://daxodewime.weebly.com/uploads/1/3/1/3/131398188/gekegep.pdfIn PDF document text
    • https://bexopugizabon.weebly.com/uploads/1/3/4/0/134042324/9156408.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_e61dadea76b447ac9c869f992aff1151.pdf?index=trueIn PDF document text
    • http://daremafuxabo.rf.gd/1000_bosquejos_biblicos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7201ef0c-858d-4a1a-86b2-716480a96c81/pofalavixasigume.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/what_is_the_ratio_of_nitrogen_to_oxygen_in_earths_atmosphere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff207c11-204a-48d6-bd20-780af7770150/what_defines_a_seasonal_business.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_12f00432e1044061a27897f04781fb6a.pdf?index=trueIn PDF document text
    • http://linakagiwabofa.epizy.com/alumni_registration_form_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fad051c-2bd3-4a8d-a0c1-1b96a516e673/suzuki_book_1_viola.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/yearnings_of_the_wind_piano_sheet_music.pdfIn PDF document text
    • http://fezaxakanopejux.epizy.com/oster_coffee_maker_instructions.pdfIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_3f8480651602415fb0abfd1e0313547f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutogugej/the_lion_king_full_movie_telugu_2019_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788a25d1-65d7-4c3f-b29d-e745d5ad0d63/kopitisizekoxaro.pdfIn PDF document text
    • https://108bb973-5399-4bf7-a70e-a18780752cac.filesusr.com/ugd/760a88_392760c3c53646348138f2325aaf4998.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/tenancy_contract_template_abu_dhabi.pdfIn PDF document text
    • http://jubuzixabes.rf.gd/measuring_up_live_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0905a405-6fd8-4433-b7d9-c5f84685da98/hp_designjet_500_ink_cartridge_error.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/yo_tengo_tu_love_letra_y_acordes_de_guitarra.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_off00012acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACF 5240 bytes
SHA-256: e6dc79f79dba3ce92d4b78119c193874e6012d996c000b65fdd22f385a1f8301
font_01_sfnt_off00013cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBE 11960 bytes
SHA-256: 8732bb141580032d00dd0332abed47f014e473afbda5fc00abc625b4e772f778