Malicious PDF — malware analysis report

Static analysis result for SHA-256 23540966d65dca57…

MALICIOUS

PDF

113.8 KB Created: 2021-03-18 09:54:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 265b9074ef5377babf58411e39ced7e4 SHA-1: 21976086abe45e7a488913cb8ca3de106a819cfc SHA-256: 23540966d65dca570d16775f243b085418eaa0ee3d3ab4c78a9b3ebea5c85c98
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The embedded URLs point to various domains, likely used to distribute further payloads or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=objecto+humidifier+how+to+use
    • https://cdn.sqhk.co/suxujaba/hcbjhGM/best_network_marketing_companies_to_work_for.pdf
    • https://mazazujusuvazix.weebly.com/uploads/1/3/1/8/131856432/gonatuxir.pdf
    • https://nupigefaxobabu.weebly.com/uploads/1/3/1/0/131070289/zudawonakaxena-lixuf-rukexikezuveko.pdf
    • https://vibitidit.weebly.com/uploads/1/3/4/7/134712982/963c3abd3e.pdf
    • https://pikupazu.weebly.com/uploads/1/3/4/5/134577858/tizibilazorov.pdf
    • http://zoomita.fun/conditional_sentences_exercises_mixedqqi1o.pdf
    • http://wiinorama.website/wifi_booster_for_android_free_apkxnrju.pdf
    • https://cdn.sqhk.co/kevamubeminu/YjeSGVP/95517287226.pdf
    • https://linugezi.weebly.com/uploads/1/3/4/2/134265501/878e8e1c25a94f5.pdf
    • https://meluwirukumipi.weebly.com/uploads/1/3/1/4/131483006/jujufaxavunaz_lodoredu_nawudolu_piridid.pdf
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/284f4b0.pdf
    • https://cdn.sqhk.co/kuwusemob/ChJqhfz/maxeruzigijuk.pdf
    • http://good-production16.site/rorawevaritudewenurenb7ktj.pdf
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/kowubiko-dudawixe-sijonegovupiw.pdf
    • https://wufunuxiropid.weebly.com/uploads/1/3/2/7/132712508/d85a8.pdf
    • https://foluxodemebomo.weebly.com/uploads/1/3/0/7/130739593/lamukid.pdf
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/pabuxefazabig-tizeru-junabajewip.pdf
    • https://lisopivoxo.weebly.com/uploads/1/3/4/9/134901835/nekixevubara.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dixurudij.rf.gd/spotify_playlist_to_pc.pdf
    • http://pugasixowofizij.epizy.com/dungeons_and_dragons_3.5_e_character_sheet_generator.pdf
    • http://vavuduzika.epizy.com/sojulijurujigataj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001740c.bin
f667575c857db6c2b418dd9ea81ff2cce12d77d5e1477bf9b507d9e4ea81c1ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1740C 5132 bytes
font_01_sfnt_off00018595.bin
2fdf06b4560941b15568135845f66e3270b93147e3fa73a8e7092de84808f1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18595 11200 bytes
font_02_sfnt_off0001aae4.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAE4 4324 bytes

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