Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69b92a834b32ae7…

MALICIOUS

PDF

75.8 KB Created: 2021-02-10 23:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: faa490a732ca153b2c3dbe5dcb0f3c82 SHA-1: 04f8eade18e6af99f8c5f8604d20768f1d7a9dd4 SHA-256: a69b92a834b32ae7d599d9654dcc596d93cc38c6ca24adbd6e58e5c5b58367ea
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' and the presence of URLs like 'druttle.ru' indicate an attempt to drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly support the malicious verdict, classifying it as a phishing or trojan PDF.

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 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://druttle.ru/wb?keyword=auto%20click%20apk%20android%206 PDF link annotation
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/mabumajaladunabo.pdfIn PDF document text
    • https://tobosuxonekid.weebly.com/uploads/1/3/4/4/134493818/bc0e05e6ada.pdfIn PDF document text
    • http://dayzcommunity.info/kosofezanulonemklgk2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403684/normal_5ff3348beadc7.pdfIn PDF document text
    • https://bupimapigi.weebly.com/uploads/1/3/1/3/131383283/8756634.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/movixepu.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/sibutejarunulapu.pdfIn PDF document text
    • https://xuwomiber.weebly.com/uploads/1/3/0/9/130969046/lawewaxede-gobexilefi-wetexaxog-luvufipijiwaxi.pdfIn PDF document text
    • http://antonio-ita.space/tablas_de_multiplicar_para_imprimir_del_1_al_12szxjm.pdfIn PDF document text
    • https://larezonisu.weebly.com/uploads/1/3/0/7/130738889/1209271.pdfIn PDF document text
    • https://pazopoxe.weebly.com/uploads/1/3/5/2/135293382/0d0ba.pdfIn PDF document text
    • http://sputnews.com/slime_rancher_xbox_one_cheatsn3z0c.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/2431567.pdfIn PDF document text
    • http://1xbet-registr.site/para_que_sirve_el_entero_guanilmb0d7.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/gakogoxot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500189/normal_5ffc1992e722b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/anbe_sivam_tamil_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/kalashnikov_horse_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/45422363979.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/vagosajazakofafugumikavo.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/36795279925.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_off0000ec49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC49 5096 bytes
SHA-256: fc1244941d5b7690910d8b58986fa29118369b3f152c27eb2c31414e3479250c
font_01_sfnt_off0000fdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB1 10664 bytes
SHA-256: a75310c8f586eeaae760d1553097504ffd76ed3fdbc70a868acb81fb6f67bd78

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