Malicious PDF — malware analysis report

Static analysis result for SHA-256 0320b6aef8cff254…

MALICIOUS

PDF

74.4 KB Created: 2021-02-26 02:15:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ad9563102ac412132e6cd73cfdd7b9ec SHA-1: e9dd13819a79dfa1d1a1aa86febe048e82cad7cb SHA-256: 0320b6aef8cff2540207551681dfa92f49d04764db086f9719444a4d154a3a5c
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=what+call+to+action+mean PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413113/normal_5fd8851a566b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417983/normal_601e2381733b7.pdfIn PDF document text
    • https://lobumemimakagom.weebly.com/uploads/1/3/3/9/133999871/0acd9.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/can_you_sue_if_falsely_imprisoned.pdfIn PDF document text
    • http://vasugixoba.22web.org/java_vm_windows_10_32_bit.pdfIn PDF document text
    • http://punejew.mygamesonline.org/franny_and_zooey_salinger.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/rubibudujakuwujepife.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/how_to_work_a_dsc_alarm_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_6012beae577cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_5fd64f90ad9a6.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/wufujudisu/asm_handbook_volume_19.pdfIn PDF document text
    • http://nununad.myartsonline.com/xujawivoguwupomawef.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/assistant_public_prosecutor_application_form_kpk_2019.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/rinotovawidevaroxajerinut.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/nfl_injury_report_chargers.pdfIn PDF document text
    • http://wuparol.epizy.com/dewuzorewuwafugufonunegam.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/gunevut.pdfIn PDF document text
    • http://zarazemudaseri.epizy.com/88674476007.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/ballerina_movie_mp4.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_off0000e896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE896 4776 bytes
SHA-256: e3f77ab0ae6f642a85fc7836802dc4aac74375d219920f7dc3ca55ad7ac77aff
font_01_sfnt_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 10556 bytes
SHA-256: a50520b9f4c7908bde292d62f613aeeb489fc6aba17de96ef6c516a382538afb

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