Malicious PDF — malware analysis report

Static analysis result for SHA-256 142c9d1ad5c8f98e…

MALICIOUS

PDF

72.9 KB Created: 2021-02-22 17:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 40c2bd1c6b38d89f23846ff232767319 SHA-1: 882929225a4dd2b6dc2d1afa1fd1ba8f3451ed27 SHA-256: 142c9d1ad5c8f98eeeb9ba747be6163bd10c1d04ad1414fa3ee5dc2e7454af94
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=multiplication+and+division+of+integers+worksheet+pdf In PDF document text
    • https://rogubadivuna.weebly.com/uploads/1/3/4/3/134337887/7828748.pdfIn PDF document text
    • http://ebay-coupon.ru/kezulisowizavewivagugukafpzm34.pdfIn PDF document text
    • http://ita-women.space/can_i_build_muscle_on_a_vegan_diet1kplz.pdfIn PDF document text
    • http://chategratis.online/68777047910escr1.pdfIn PDF document text
    • http://titoto.xyz/ad_d_2nd_edition_monster_compendiumvrevp.pdfIn PDF document text
    • http://clebohets.xyz/diccionario_de_sinonimos_y_antonimosfv5xr.pdfIn PDF document text
    • http://4338bacchus.com/gta_5_ppsspp_iso_highly_compressed_androidb8ws7.pdfIn PDF document text
    • http://bilkan.fun/56175955739nfmhq.pdfIn PDF document text
    • http://citimart.online/sidisozukobifirorigixexavp578c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/petikamov/school_2015_sub_indo_360p.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/pesetu.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/91756892024.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/the_big_fat_surprise.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/dezosigogawogaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/sodubazuw.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/19348989800.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/hippeastrum_planting_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD166 5520 bytes
SHA-256: 9a81ffef7fc87606f25be8f94ed6f56bc6334fd087bc9be0d38e691aadb1d7cc
font_01_sfnt_off0000e43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43C 10452 bytes
SHA-256: 45cc6cd6429cedb95059181ea6ec2e8a1fb71af1de999647b948d622e219667a
font_02_sfnt_off000107fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378