Malicious PDF — malware analysis report

Static analysis result for SHA-256 862db750ad536a7b…

MALICIOUS

PDF

74.6 KB Created: 2021-03-17 20:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0e70c5fd65aec5fa4e633a20b9e1f3bc SHA-1: 14da482bfd880496a4e8528a28284b052ad6ac35 SHA-256: 862db750ad536a7bd2e379432a1523aecec459e1cbbcc734c08b7d1b94cde745
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 0.9997

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://zajinet.ru/award?keyword=fairy+tales+in+english+pdf PDF link annotation
    • https://mimevomakiket.weebly.com/uploads/1/3/4/6/134693464/tefaxasono_vozenigiri.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/algebra_practice_workbook.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/CctkgdX/90492935407.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/be74d3a.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/frases_de_paulo_coelho_el_alquimista_el_universo_conspira.pdfIn PDF document text
    • https://puwikemumej.weebly.com/uploads/1/3/1/4/131454306/pesiwasubuke_fobuxoz.pdfIn PDF document text
    • https://cdn.sqhk.co/marezotije/jh0jjnS/57015925288.pdfIn PDF document text
    • https://tagorawijetix.weebly.com/uploads/1/3/5/3/135392874/6d1f8d70.pdfIn PDF document text
    • https://lefiluke.weebly.com/uploads/1/3/4/8/134887161/090827.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/cf00fcd3b38ac7.pdfIn PDF document text
    • http://getyourscore.info/gesasabigf410l.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/dIJihwO/ragdoll_push_script.pdfIn PDF document text
    • https://cdn.sqhk.co/simizekovogi/eKkjdG0/dino_hunter_deadly_shores_download_for_windows.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/gh7rhee/zekenewil.pdfIn PDF document text
    • http://govnosiakxws.online/braun_thermoscan_ear_thermometer_manualzg43m.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/25916078362.pdfIn PDF document text
    • http://zovolexune.sportsontheweb.net/26562827613.pdfIn PDF document text
    • http://easy-money-cash.space/14461784688ftnpz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tokejavopif.rf.gd/headway_beginner_english_book.pdfIn PDF document text
    • http://rukinozo.epizy.com/butuzew.pdfIn PDF document text
    • http://votofeki.epizy.com/12255885843.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_off0000e68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68F 5360 bytes
SHA-256: 2fe0309204ceeb9fabe622d159c39477afb893b28209c1b476e49d1e13670129
font_01_sfnt_off0000f8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D2 11056 bytes
SHA-256: b296c6582f66213821bea7126091d5c66b3ac9b92de4d3b3c65319245e4e58a7

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