Malicious PDF — malware analysis report

Static analysis result for SHA-256 4807e2b4551c0860…

MALICIOUS

PDF

83.5 KB Created: 2021-03-01 20:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e3c7d988b3bd397c70cdfd32b972fcb6 SHA-1: d1d82b6eb1923d0f9af1ca64ba39c97b44a8296b SHA-256: 4807e2b4551c08605fe36d676c9cc0ae9f3698ca04abd5c28ab5df1bf705b430
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious content.

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://midufefew.ru/strik?utm_term=badger+insinkerator+5+clogged PDF link annotation
    • https://masezinonorokun.weebly.com/uploads/1/3/4/6/134685416/1facc51fcb9204c.pdfIn PDF document text
    • http://helpverifybadges.com/rejizorifovugolunujadewhr9h.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/hB3STia/xukutasupuwuzawopexina.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/haUACic/fake_video_call_cartoon_cats.pdfIn PDF document text
    • https://ruxibotululag.weebly.com/uploads/1/3/1/4/131408142/gizuxe-gokanawikodikum-kopomadefo-manezejorugi.pdfIn PDF document text
    • http://lnstagramsupportlives.com/exempel_p_allelopatirz8b3.pdfIn PDF document text
    • https://burivoren.weebly.com/uploads/1/3/4/2/134265934/putepedusebavijita.pdfIn PDF document text
    • https://cdn.sqhk.co/fivukidado/To8hhqL/tunein_radio_free_download_for_windows_10.pdfIn PDF document text
    • http://thrivewebs.com/sapijipaluuioog.pdfIn PDF document text
    • https://wisevagidigo.weebly.com/uploads/1/3/0/7/130740356/desajeku.pdfIn PDF document text
    • https://cdn.sqhk.co/nenafodud/JhdhsHS/spin_the_bottle_questions_adults.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/faluzotixupi/onn_wireless_mouse_connect_button.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/devilbiss_pressure_washer_unloader_valve.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/double_bed_sheet_sets_on_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/37752039970.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/97654028715.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/14684876861.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/creature_3d_full_movie_720p_bluray.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/nubigavo.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_off000109f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F2 5344 bytes
SHA-256: fd290244ba8b4e550e1386e09909c57c51d149e224f47baa0deec5ba6cb9f69a
font_01_sfnt_off00011c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 11128 bytes
SHA-256: f2001f7121daac2c74a54e22e4049a13cfa1f9c2f3e8257649476e87f454db35

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