Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f60772835a048b8…

MALICIOUS

PDF

79.4 KB Created: 2021-03-16 03:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acb07a4490a6a52b9fa70a1bb2b15ad4 SHA-1: 98461e026413266e07e75c736d91237951ecf6dc SHA-256: 1f60772835a048b897ae457082191adc4b04cefefb47a7f112b0f732b18ceab9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' suggesting SEO manipulation or a phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, potentially for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=suicide+is+not+the+answer+to+your+problems
    • https://dabefetuxof.weebly.com/uploads/1/3/5/3/135320161/bifavewusugi.pdf
    • https://wakepazatojux.weebly.com/uploads/1/3/0/8/130873951/duzipisaxi_zoderiwamefodo.pdf
    • http://pro-komp-master.website/vexotuburesua9nle.pdf
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/dbfb70041b61ad.pdf
    • https://cdn.sqhk.co/suwapipejob/jjjgibU/wesowu.pdf
    • https://cdn.sqhk.co/juzosugun/idhaxzR/run_run_rudolph_5k_clay_s_park.pdf
    • https://cdn.sqhk.co/sejixikerut/jhpdjdx/assembly_line_worker.pdf
    • http://nijovilof.iblogger.org/sixipemonef.pdf
    • https://cdn.sqhk.co/fakineduxafe/fTvKhf9/arte_de_la_guerra_resumen_por_capitulos.pdf
    • https://cdn.sqhk.co/pibegufuxova/njjiheU/special_forces_group_2_mod_apk_old_version.pdf
    • https://temisufe.weebly.com/uploads/1/3/5/3/135384001/4601843.pdf
    • http://obzorov.site/how_to_connect_macbook_to_samsung_smart_tv_bluetoothqx3da.pdf
    • http://fixmarker.fun/kesirisevulelitua8c7.pdf
    • https://cdn.sqhk.co/tosolizidovi/jjabbgi/lazusaforaloboganegugogu.pdf
    • https://xevumijujivo.weebly.com/uploads/1/3/1/3/131383583/5822615.pdf
    • http://retys.fun/how_to_make_a_homemade_easy_face_maskgw0l5.pdf
    • http://educationonline.website/mimajoretakupusidowibanoepanx.pdf
    • https://cdn.sqhk.co/xinefegepe/gcjgjhv/voketinususi.pdf
    • https://cdn.sqhk.co/tixunadegu/jfCCYgh/mad_battle_royale_apk_hack.pdf
    • https://cdn.sqhk.co/wemorapi/ejcij0I/redline_drifting_v3rmillion.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/musoxifuvitalo/99568036745.pdf
    • https://s3.amazonaws.com/befarekogol/filawoxakizolopowadewojid.pdf
    • http://zebusodevig.rf.gd/6402470520.pdf
    • http://fositelorefux.epizy.com/55949795486.pdf
    • http://dijilupejiba.rf.gd/97642342987.pdf
    • https://s3.amazonaws.com/polexebuj/cal_king_wood_platform_bed_frame.pdf
    • https://s3.amazonaws.com/jivuxo/jemiwiligipita.pdf
    • https://s3.amazonaws.com/dowadotiju/arabic_orthography.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f861.bin
08a056a03adffc1422dcb6bb55f36de578dc9df65c470b06c737951fbd73ab57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF861 5752 bytes
font_01_sfnt_off00010bdb.bin
72208bb8e6cf99f213406f87a211f63d7a34af9ebaf4382564f4fcbd337e8d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDB 10476 bytes

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