Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ca0450c8116f08…

MALICIOUS

PDF

67.4 KB Created: 2021-03-19 04:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 10fce3b54ee952495595fb80bd01c1fa SHA-1: b3f96d7f5be81655ee4efdff9197a2e146b714e0 SHA-256: 01ca0450c8116f085e94a6d435caa44c75fcd6acf0bacca82ebfdfd16fe2c26c
186 Risk Score

Malware Insights

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

The sample is identified as a phishing lure impersonating WhatsApp, directing users to a malicious redirector. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to obscure the final phishing destination. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xiwabedosebu.weebly.com/uploads/1/3/1/3/131398066/mibedidufeseduv-sipotivavurawab-xapubesel-nunuwepet.pdf.
  • 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://mezovuduw.ru/123?utm_term=euphemism+quiz+with+answer+pdf PDF link annotation
    • http://vemafenuxaj.22web.org/96183107470.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/3142554204.pdfIn PDF document text
    • http://waliduv.mypressonline.com/can_you_play_2_player_monopoly.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/gotibezupupofuni.pdfIn PDF document text
    • http://xilatotes.sportsontheweb.net/dark_souls_bosses_ranked_best_to_worst.pdfIn PDF document text
    • https://xiwabedosebu.weebly.com/uploads/1/3/1/3/131398066/mibedidufeseduv-sipotivavurawab-xapubesel-nunuwepet.pdfIn PDF document text
    • https://xusozetogiza.weebly.com/uploads/1/3/4/6/134620001/7182240.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/9448099547.pdfIn PDF document text
    • https://muwevowaxa.weebly.com/uploads/1/3/5/9/135992822/tikaromajisu.pdfIn PDF document text
    • https://wopebodolafov.weebly.com/uploads/1/3/2/7/132741389/c17c8b4fbbf.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/xekezezaz.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/kudesimefepipepupaxefim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wevosowenafa.epizy.com/55884354861.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/betazive.pdfIn PDF document text
    • http://zagaturatok.epizy.com/84863882732.pdfIn PDF document text
    • http://falogivaxaf.epizy.com/hodder_education_gcse_history_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/5925063292.pdfIn PDF document text
    • http://vofefigekoloru.epizy.com/wojinum.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/30099219961.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/dajebirojuzaji.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/excel_vba_message_box_drop_down_list.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/wexorediliwadimiselov.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/15174956386.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_off0000cbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF5 5472 bytes
SHA-256: dd0517cdbdf85b9293d079214514a225d2e64516323d7b16e4c34273f704d1ea
font_01_sfnt_off0000de7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7F 9880 bytes
SHA-256: 0281526e98c1c24da1b47071ecce31d2d1c3187e49695a12afd09bc6f68b3d97

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