Malicious PDF — malware analysis report

Static analysis result for SHA-256 7579c98afa58e6a7…

MALICIOUS

PDF

65.4 KB Created: 2021-03-05 03:29:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 497d3e0842851d31748222bcbb5cbcda SHA-1: 825647683f781f2c1178d9130dbb8b95392c7dcb SHA-256: 7579c98afa58e6a71583de11651ae8d0e2f503f38c02c7f7a309cd2261c1d799
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.8471

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 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
  • 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://ponafet.ru/award?keyword=what+do+you+mean+by+value+of+education PDF link annotation
    • http://wukimokoled.iblogger.org/38809435409.pdfIn PDF document text
    • https://lefamadagizid.weebly.com/uploads/1/3/4/7/134704745/juwanigaludaxat_pawibubopetumor_masiregajaduno.pdfIn PDF document text
    • http://muvubaziforobe.iblogger.org/is_cinder_appropriate_for_a_10_year_old.pdfIn PDF document text
    • http://wijulewotolag.22web.org/past_simple_form_of_the_verb_choose.pdfIn PDF document text
    • https://wuzakadebetes.weebly.com/uploads/1/3/0/8/130814976/zevazelux_telekebe_garudebi_gowugepave.pdfIn PDF document text
    • http://lisojuribopuwad.22web.org/ti-nspire_cx_premium_teacher_software.pdfIn PDF document text
    • https://kimonasisu.weebly.com/uploads/1/3/5/4/135400987/1617223.pdfIn PDF document text
    • http://kebakef.iblogger.org/what_trucking_companies_offer_free_cdl_training.pdfIn PDF document text
    • https://rodagekutav.weebly.com/uploads/1/3/5/3/135313742/xigoriseg_fuwifiwis_joramajibamudi.pdfIn PDF document text
    • http://sedobepotorosi.22web.org/desktop_computer_desk_bookcase_combination.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/1bf1c91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibalaluroxute.epizy.com/xatemavakogulika.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_ccdbb123845d470892bfe9b0b685632d.pdf?index=trueIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_c8708b3fbe5f417ebfc935fb19c6a058.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa50ed81-c1ff-4ee5-8d3c-f1ec7c93f2fa/xejoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c426b14a-75dc-4aa9-9209-09f854494c10/porter_cable_pancake_compressor_regulator_repair_kit.pdfIn PDF document text
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_a1ecbd40b3714fbba0114ae496f91dcf.pdf?index=trueIn PDF document text
    • http://beritoka.rf.gd/ssc_gd_result_2018_answer_key.pdfIn PDF document text
    • http://velizufilalate.epizy.com/63214588073.pdfIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_d1fff795f80d45f8882760d2c4baad54.pdf?index=trueIn PDF document text
    • http://nenutufap.epizy.com/nipipizumeneladipatepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/559e2d3e-cf6f-43b2-a6b9-b6ca811b1b57/what_food_is_good_for_bulking.pdfIn PDF document text
    • http://wafubarig.epizy.com/51808551894.pdfIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_d4eb94f253dd48c2818bdd5fc25d24d2.pdf?index=trueIn PDF document text
    • http://kizuwopo.epizy.com/all_video_converter_mp4_software_free.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 5304 bytes
SHA-256: 59178700f3000bf52c06795026b09441d57c7499fae3b518d6e5ed2f5ef7248a

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