Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a7129c708bfba1…

MALICIOUS

PDF

77.8 KB Created: 2021-03-10 01:30:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7d57074dc217d45fed8cae214fbb3b5c SHA-1: 0903a2138eb8e0513a7ea509daa6f18f78d5ad8e SHA-256: 42a7129c708bfba141651feff6789d7dda80bfab949daed0036211773f68cc56
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/aws?utm_term=merchant+of+venice+act+1+scene+3+character+analysis PDF link annotation
    • https://cdn.sqhk.co/dixejetafap/mKgj1hd/teacher_appreciation_week_2020_ideas_coronavirus.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/jgfQhgP/sidoposafojefawix.pdfIn PDF document text
    • https://cdn.sqhk.co/xidodaxu/ehe7mhb/jatutuvokoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/gWqIShf/77846794429.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvopone/eqhgjbc/93924032945.pdfIn PDF document text
    • https://cdn.sqhk.co/juxezijafoz/zVjeDwT/gacha_life_videos_not_on_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/MUvahcZ/how_to_say_hi_in_french_creole.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/3245642389.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/h423JVK/tip_top_grill.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/6ecAjj5/dewalt_7_tool_kit_home_depot.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/CbhjIib/vulowatevojavunegofilusup.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/XDvifih/discipline_reward_chart_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/nYgdBii/sakepeweba.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/does_super_shred_diet_really_work.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/i4wUggT/11643755907.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/QVRgdvU/cross_border_solutions_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/selusujava/hbwxgg5/how_to_draw_cut_the_rope_2_characters.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_4374eba7a8bd487d9077da64eb002e8e.pdf?index=trueIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_2042f3ab261f4a73bbb1c1093a69731d.pdf?index=trueIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_c7459bda1d7640e9a5839fab1b8cffa4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c0bd5c-fa57-4890-b7ef-3458b909be3b/modo_de_produccion_socialista_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccce1a9f-79aa-434f-a5a7-8363ca47b434/xoxilaxuferega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5b75f1-1835-4644-b4e7-10370ae5eb34/dungeons_and_dragons_board_game_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7cd68e7-9fa7-4041-a499-655312050755/dell_monitor_wont_turn_on_after_power_outage.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_off0000f1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CC 5352 bytes
SHA-256: 28a4f50131b79d49fe5a9ceda362f369b5ae2999c5aa56df511dad8a833802b1
font_01_sfnt_off0001041f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041F 10780 bytes
SHA-256: bbf2adda8deae8f83faaee793e31d7ba93db582cc56026889b9474968af86ba5