Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c23b5fb52083b8…

MALICIOUS

PDF

85.4 KB Created: 2021-03-16 00:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d779e174b3f9e806d0491e6b0644e09f SHA-1: a4f1a52dccfa5f3d7da3e54a856fc4b8f5f1392b SHA-256: d0c23b5fb52083b84351ebdaf215c90d67992fe49421f68c0553141823d267d4
156 Risk Score

Malware Insights

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

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 0.9991

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.
  • 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://ponafet.ru/award?keyword=calligraphy+practice+sheets+pdf+free+download PDF link annotation
    • https://bituxomixa.weebly.com/uploads/1/3/4/1/134131270/bakukoxokil.pdfIn PDF document text
    • https://ropugobefele.weebly.com/uploads/1/3/4/4/134445072/jezadanodiru.pdfIn PDF document text
    • https://dubuvolikumo.weebly.com/uploads/1/3/4/0/134012832/2979594.pdfIn PDF document text
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/labuwolosari.pdfIn PDF document text
    • https://wuwenesugujiku.weebly.com/uploads/1/3/0/7/130739695/5800738.pdfIn PDF document text
    • https://dorewedekubur.weebly.com/uploads/1/3/4/7/134721360/0bc10e838.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/9366222.pdfIn PDF document text
    • https://padefogufagabak.weebly.com/uploads/1/3/4/7/134714354/af041b16744d8.pdfIn PDF document text
    • https://kenaveduku.weebly.com/uploads/1/3/0/8/130813649/9499011.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/etiology_of_anemia.pdfIn PDF document text
    • http://gejejasofubi.mywebcommunity.org/nibedudugulidim.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/remavuj/60705631286.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/what_is_ring_size_for_cigars.pdfIn PDF document text
    • http://zuxorijafofonal.rf.gd/14355860266.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/why_does_my_oven_fan_keep_running.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/fabew.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/dojenemumifa.pdfIn PDF document text
    • http://wikeratofi.epizy.com/history_of_translating_the_bible.pdfIn PDF document text
    • http://fufibilola.epizy.com/guwamamuxomipogowav.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/commandos_2_game_full_version_pc.pdfIn PDF document text
    • http://dawabarefexuf.epizy.com/que_elementos_de_la_tabla_periodica_son_solidos_liquidos_y_gaseosos.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/83238375998.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 5424 bytes
SHA-256: 04b9b77ec1faf0d1ec9a95115c9bba6e74f5a0e8556e1a89f3eb62c66dfe43d5
font_01_sfnt_off0000fe19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE19 11164 bytes
SHA-256: 21c386a89d9c677afca79ff122e9c8c71021616e996aa26c3dd3dae9c0d62f56
font_02_sfnt_off00012405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12405 16192 bytes
SHA-256: d4c4feb8951055c2fa9bcdd55af7a36c85e906000362d0091f30ac23a55c13ed
font_03_sfnt_off0001393d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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