Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4713767e63ccd3…

MALICIOUS

PDF

111.9 KB Created: 2021-03-21 04:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2342a91cab5bde95a6917f048379722c SHA-1: 5f743f874b45d6c490d75b80c4c070c10f7b1031 SHA-256: ab4713767e63ccd35fca622fbdc13a2be8758032b5b98ef3fe4e937a7fb09a21
126 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'CIA agent training' and embeds multiple URLs, one of which is a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=how+many+years+does+it+take+to+become+a+cia+agent PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366321/normal_60537b2b3b058.pdfIn PDF document text
    • https://cdn.sqhk.co/waganozusi/cEsYZeS/multigba_s_beta_multiplayer_gba_emulator.pdfIn PDF document text
    • http://lulilafemavivog.mygamesonline.org/zetatelixafugazo.pdfIn PDF document text
    • https://cdn.sqhk.co/nunexijezep/2hihgDe/xetonimexa.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/vaxinijijo.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/cWfjhy2/dupajolonabojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_5fe9479e1a3de.pdfIn PDF document text
    • https://cdn.sqhk.co/subetudagoli/jiujdCY/pujovajolotebutazane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467322/normal_6035b659129bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_600fa4af614e5.pdfIn PDF document text
    • http://rufawefojag.sportsontheweb.net/61864989095.pdfIn PDF document text
    • http://ruwufuwetoj.mygamesonline.org/21248837537.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lufopudizomuv.atwebpages.com/wemokubovufeguka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde7571b-4886-4cae-b76c-77c4ea4762cb/19110226755.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/input_button_onclick_submit_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/una_lista_de_verbos_regulares_en_ingles_y_espaol.pdfIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_a91923a4a17249c288b91e586f056042.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b760df44-642e-496d-9253-73b9ec307fec/dr._heideggers_experiment_symbolism.pdfIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_e0ddf02f06d24cdab310a592c332d04c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/visurufo.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_fb25475278f749b4b115a168ae340997.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d4d64c-3c0e-458e-80fe-4c77affd451c/aircare_humidifier_reset_clean_filter.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_off000176fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176FA 5584 bytes
SHA-256: 8ab7f63a36bf1dba75ebf965912f7b8559daadac2d5a00d2bd595a01a5069abd
font_01_sfnt_off000189f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189F4 11836 bytes
SHA-256: d4159012aba1858848993b88054e0624987b5d297d041fa9c767815221d491cf

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