Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07728c568c13945…

MALICIOUS

PDF

104.3 KB Created: 2021-05-18 15:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: de58ac00a89a69eccc9102e605750f63 SHA-1: c87af18206d22f241bc87e7d941ae969a5c89b8e SHA-256: a07728c568c1394558242aa5b45f0d0c2cc2c037dbdde9d628630ead7668a1f4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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://dugedepap.ru/strik?utm_term=how+to+get+minecraft+story+mode+in+2020 PDF link annotation
    • http://mimudobaros.22web.org/boise_cascade_lvl.pdfIn PDF document text
    • http://tizevij.iblogger.org/68294544372.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470535/normal_5feee566c6976.pdfIn PDF document text
    • http://sojuvofud.22web.org/70254041305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_603f1d6382a05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_602b77e407f8a.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/631a1711-0137-472e-bc2f-1b1a485970c9/barnett_rogue_crossbow_4x32_scope_package.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd6bfcb-68ee-49d2-94df-56269feaeb66/manual_digitech_rp80_em_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3130e77-caec-4eb6-8359-3aaa99533917/how_to_use_scanner_on_thinkorswim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668d22dc-1752-47e4-897b-ed0f9c6c8bcb/midnight_in_the_garden_of_good_and_evil_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5828e640-c789-4929-9d16-f732cf1646f6/80843767141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6240a49c-d5a7-4d90-b6fc-6a9eac090f9c/66256867420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f00ee6-0184-47fd-bbfd-7778b4b8eeb9/67518973759.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/jobusorixi.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/navy_bmr_assignment_13_quizlet.pdfIn PDF document text
    • http://wukiwopujiba.rf.gd/calendario_festivos_colombia_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c1a165-3b85-446f-9a5f-283f11cf543b/broan_allure_36_inch_range_hood.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/android_phone_comparison_chart_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/bootstrap_admin_panel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8917cafc-7b59-471e-bbd5-00c5feec790c/how_to_get_rid_of_raised_pimples_on_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a600679-28bf-4698-b131-936180dfe5bc/19257585823.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/gafupinalar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386d8a8c-54a1-437a-b940-61c637741531/89660406990.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_off0001593a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1593A 5740 bytes
SHA-256: 59398c2a7725ed37cf49780d1e7cbaaab955c252c5bbab57e8d6224f3d6e303b
font_01_sfnt_off00016ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CCD 11780 bytes
SHA-256: 454d66ef9275fedadcfcadd6720bf4f3cc32a9aeacb6b512f061bde19bfc24ab

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