Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c507010423c8476…

MALICIOUS

PDF

91.1 KB Created: 2021-03-22 10:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e4cc7b34e27cf0f4cf273ed8559e3af4 SHA-1: 3c7d2df205e9a1d394d5846089e0c3d673387075 SHA-256: 9c507010423c8476ff53c448dff17ed81024b1d6704391109b936fddfc7a1cae
126 Risk Score

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 0.9955

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://crophysi.ru/123?utm_term=bharatanatyam+mudras+chart+pdf PDF link annotation
    • http://sevowina.medianewsonline.com/13810582607.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/36127000824.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/681742.pdfIn PDF document text
    • https://xovewelokajefi.weebly.com/uploads/1/3/4/8/134864882/6017a.pdfIn PDF document text
    • http://getyourcredit.info/pudokezotimawokakubudelhrt3p.pdfIn PDF document text
    • http://olivamebel.com/graphpad_prism_5_download_gratisye8vo.pdfIn PDF document text
    • https://lafevisok.weebly.com/uploads/1/3/2/6/132683062/9e14bdb.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/how_much_would_it_cost_to_start_a_baking_business.pdfIn PDF document text
    • http://dusikazo.mypressonline.com/evermotion_archmodels_41.pdfIn PDF document text
    • http://bolawixefop.mygamesonline.org/bomipufepazibotubokukukim.pdfIn PDF document text
    • https://mexepuxirubu.weebly.com/uploads/1/3/4/6/134663189/7be82.pdfIn PDF document text
    • http://idslim-italia.site/50509446168an56b.pdfIn PDF document text
    • https://begafirezudafo.weebly.com/uploads/1/3/1/4/131438667/butokojajojivisof.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/13125393151.pdfIn PDF document text
    • http://goodxday.xyz/meal_plan_to_lose_weight_and_build_muscle_femalefmxam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/punurum/bugler_s_holiday_sheet_music_trumpet_trio.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/venn_diagrams_probability_worksheets_with_answers.pdfIn PDF document text
    • http://kalasoziluxolim.myartsonline.com/saxebare.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/pojaxaruvawubuzewa.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/haynes_repair_manual_1996_ford_ranger.pdfIn PDF document text
    • https://7043ee2c-bc2d-4d46-b82c-b0075177c1aa.filesusr.com/ugd/f862b5_59500ea1307c4c99a7f62179cd53e059.pdf?index=trueIn PDF document text
    • http://ledufowi.myartsonline.com/antepartum_fetal_monitoring.pdfIn PDF document text
    • http://begujewirefe.myartsonline.com/lamentations_of_jeremiah_stroope.pdfIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_fb09c5025b2f4a2693d8230f0025ce66.pdf?index=trueIn PDF document text
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_6303aa7c8ce2451c8d427841826831af.pdf?index=trueIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_91ecb1a9fa6e4c6fb090e6c69d2d8023.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001194a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194A 5120 bytes
SHA-256: 1ed449ddbe8db1db185f05e2d942b10a600dfb495062e50f828b7fc83a3e9663
font_01_sfnt_off00012a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A85 12396 bytes
SHA-256: 7d9cd8e3231f7590e588120c29a71ef1760f9b29de677d5650c5a31898bf0676
font_02_sfnt_off000150cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150CD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361