Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4fec05ba1b5385…

MALICIOUS

PDF

83.5 KB Created: 2021-04-05 10:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4725c8ad3193b71cc1ada2faa794b417 SHA-1: 2c9e585fbe11f4e051aef1475e7818f0fd4c32a6 SHA-256: ae4fec05ba1b5385dba59b86fbc83a10bc15a3d7dc242d0fd5ac318525c26ef7
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and ClamAV detection. The document body, though partially corrupted, suggests a lure related to hotel accommodation plans, aiming to trick users into visiting the malicious link. No scripts were extracted, but the presence of malicious URLs and the ML classifier's high confidence score strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=tipos+de+planes+de+alojamiento+en+un+hotel In PDF document text
    • http://juilopkiretlo.ru/42392715961bljg1.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/TOHY0kj/nofipevo.pdfIn PDF document text
    • http://konolux.medianewsonline.com/94574579409.pdfIn PDF document text
    • https://cdn.sqhk.co/radofufalam/2JhdghJ/agora_video_call_android_github.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/begaxidiwagesu.pdfIn PDF document text
    • https://cdn.sqhk.co/kuretunaba/jhJEjcT/66593456271.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/geRhfvR/ticket_to_ride_rules_youtube.pdfIn PDF document text
    • http://saxosoxajivovud.medianewsonline.com/kibonosa.pdfIn PDF document text
    • http://thecabinets.xyz/aromatherapy_chartggbvd.pdfIn PDF document text
    • http://vixabaj.scienceontheweb.net/prueba_de_catalasa_fundamento.pdfIn PDF document text
    • http://ukranews.icu/51672818177h4z0r.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/sony_cdp-cx355_belt_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/wumidimux/6qriib2/49364175195.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/tuxenipup/wiziba.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/tugaxefulelizutusufesa.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/nonemefuw.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/concrete_mix_ratio_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/android_auto_head_unit_install.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/4768031588.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF967 5008 bytes
SHA-256: 17a1c76eb1df37c0bc60f4d525a481d4ff4b91c553630040dff9db3cc9bb9540
font_01_sfnt_off00010a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3C 12796 bytes
SHA-256: 000af1fd7514f56504d69ff32a287dc8a0a2f51cd6cf95a66e00193c9d107073
font_02_sfnt_off000132aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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