Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c0200529fc659a…

MALICIOUS

PDF

80.0 KB Created: 2021-02-18 14:01:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3c7342120ae6d3e80173e8212a7c16ba SHA-1: a68f627b839e689e4aaab5baca419461bba86095 SHA-256: d2c0200529fc659a46a5db787a486ec5201a8c0eeff58c55b810d3ab94cd812a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic and ClamAV detection. The embedded URL `https://seumenha.ru/wb?keyword=what%20tools%20are%20needed%20for%20woodworking` suggests a lure to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wb?keyword=what%20tools%20are%20needed%20for%20woodworking PDF link annotation
    • https://cdn.sqhk.co/furugilenu/iemhjhc/dedebezusofuzurajigetagaf.pdfIn PDF document text
    • https://pazuvokase.weebly.com/uploads/1/3/4/6/134615635/fojutosuwubeka-risukafaf-bizosefir-gewusax.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/ifhdgd1/tik_tok_video_fleetwood_mac_skateboarding.pdfIn PDF document text
    • https://cdn.sqhk.co/wapuwozelob/hde0jgL/77233299952.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/ihggjMg/35123511336.pdfIn PDF document text
    • https://cdn.sqhk.co/rijujonakuje/hchiDnA/color_hockey_game.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/aXwgrA0/one_tree_hill_road_trip_episode.pdfIn PDF document text
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/pemonugejak-sarufem-vomekonumurid.pdfIn PDF document text
    • https://cdn.sqhk.co/vudebalox/IZhaSjj/congenital_disorder_definition_biology.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/jaKmgi1/mosimunasegolebumalus.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/B4ib9gh/legends_of_runeterra_cards_art.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/bvfMVYb/nabeb.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/iiF9hgz/soledegizogalonar.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/mjjIifW/ejemplo_de_plan_de_social_media_marketing.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/jdidhct/zepeto_blackpink_app.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/jivagajamav/medical_tourism.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/porcentaje_de_cesareas_en_mexico_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/infographics_ppt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/lulomidigek.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_off0000fd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD12 5340 bytes
SHA-256: cc21439f04fb1de2a6493c4702b9c365a0062c3c2d0a7e77eabee6bbc58841bc
font_01_sfnt_off00010f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4D 10656 bytes
SHA-256: 57bb23b3f8e1075891752ad862513a3eb014398a539d3a653eb52e719667c0d9

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