Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a343e1ee1c54b7…

MALICIOUS

PDF

69.1 KB Created: 2021-02-11 14:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2892e028a7c56959d266168848bfa460 SHA-1: d714063a5e6da50e44a25fe247163a804254475b SHA-256: 27a343e1ee1c54b75b3263c76702a50ceb285829610673a9d7e6fd7083eb90a8
196 Risk Score

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://seumenha.ru/123?utm_term=navy+women%2527s+nsu+regulations PDF link annotation
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/mabigitosodubabaj.pdfIn PDF document text
    • https://ribiridoxa.weebly.com/uploads/1/3/0/8/130874248/e1ca9a8a5ad1f9.pdfIn PDF document text
    • http://bella24.xyz/chaos_rings_3_1._1_1_apkl8bws.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/dark_souls_3_best_strength_weapon_pvelsj1o.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/fehqifZ/history_of_religion_in_england_timeline.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/dBtZjjz/zomogemin.pdfIn PDF document text
    • http://zhigina.ru/earthquake_in_northern_california_last_night0fi1a.pdfIn PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/lonijotomisebu_womazif_kezopi.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/masevewi/vlookup_and_hlookup_practice_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/gold_medal_guide_red_dead_redemption_2.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/eastleigh_college_ofsted_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/samsung_led_tv_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/43392552599.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/3dmark_fire_strike.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/blockhead_crossword_puzzle_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/directors_report_format_mca.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/button_background_opacity_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/anova_precision_cooker_pro_manual.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_off0000d090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD090 5264 bytes
SHA-256: 155e4a84a8d09db1787621339aa780981dded480342e8a61a80ba1386661bd64
font_01_sfnt_off0000e289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE289 10752 bytes
SHA-256: 298b6cf7758c214b6679ebba4d8a3e46b89c691146889b9459feb8c0be495cf2

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