Malicious PDF — malware analysis report

Static analysis result for SHA-256 062e6c052a445211…

MALICIOUS

PDF

84.5 KB Created: 2021-03-20 20:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3ab498f1edafe0bba3d9ea19ac9e3b82 SHA-1: 037c744ee80e19296207b569def0b7fc00241d61 SHA-256: 062e6c052a4452111b6fc82b07fde40eb10a170f58d36157e4d19313f71006ad
196 Risk Score

Malware Insights

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

This PDF file contains numerous external links, with a prominent one leading to 'soxebez.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO abuse for malicious purposes. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://soxebez.ru/strik?utm_term=how+to+replace+cover+on+cosco+car+seat PDF link annotation
    • https://cdn.sqhk.co/ronofumito/hiig6ic/stickman_simulator_zombie_battle_appvn.pdfIn PDF document text
    • http://sesugato.iblogger.org/is_firestick_compatible_with_directv.pdfIn PDF document text
    • https://femixazate.weebly.com/uploads/1/3/4/3/134363246/ririmezu_wevaretokudexas_dodugid.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/1sphjaK/manic_panic_alien_grey_near_me.pdfIn PDF document text
    • https://vipugexisixow.weebly.com/uploads/1/3/0/7/130775501/4173901.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/jii4BW6/22114658268.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/qIs3hep/steamship_authority_parking_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/businaxidare/jdjfUii/25151565675.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvinudubuno/5AMhatI/wojowu.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/ggo6jh0/neoprene_messenger_bag_with_guitar_strap.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/voxulija/end_of_day_cashing_up_sheet_template.pdfIn PDF document text
    • http://jiwamig.rf.gd/what_is_the_salary_of_a_mechanical_engineer_in_south_africa_per_month.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/34525360510.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/33001170743.pdfIn PDF document text
    • http://tetomor.rf.gd/pentair_ic40_flow_switch_test.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_off00011082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11082 5040 bytes
SHA-256: 34a3403f712f6fdd4eb1d2910774e1a4885536f3e9aa73130602f02c3088a458
font_01_sfnt_off000121c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C5 10420 bytes
SHA-256: 8df09caab6ec8e81eeeb2bf2e27509126725abfeb15b111d2f1727fc1ce2a5ea

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