Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5d7f4363ac33b0…

MALICIOUS

PDF

85.9 KB Created: 2021-04-06 13:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ff87db2b790b6bf5c908ce6d19ab831b SHA-1: b7c4420c4163071e2c85f5bdcbece2865a9fc986 SHA-256: ec5d7f4363ac33b0abcb96f9eee15b1802d1a550e0d420724e53f50629f982d0
134 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a high concentration of them pointing to disposable domains, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains references to 'Deepak Chopra 21 days of abundance day 9 task', likely a lure to encourage clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/aws?utm_term=deepak+chopra+21+days+of+abundance+day+9+task PDF link annotation
    • http://tomandbxof.site/oracle_sql_database_10g2ka1v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498404/normal_602f97fe85838.pdfIn PDF document text
    • http://loziwazekon.medianewsonline.com/dugavuvudexubabevefex.pdfIn PDF document text
    • http://reabook.online/jopisewajikajavobeb4xep.pdfIn PDF document text
    • http://letnesil.xyz/sulosidaxumefegumevevosugzqzlq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fdeb342e829e.pdfIn PDF document text
    • http://ingmijn.com/708222186303rwro.pdfIn PDF document text
    • http://insta-sale.site/how_to_reset_the_time_on_a_speed_queen_commercial_dryerc1nz1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5ffd7da46032e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445119/normal_5fcdfff694ea6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_6039164b9475e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bamonoxo.onlinewebshop.net/candide_voltaire_romana.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/1219592400.pdfIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_42019463de424c31bcbd2bd127dd44c5.pdf?index=trueIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_197dcb76768a40c79172a65795132d6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gogunabones/fuwipijuvejozifonesafig.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_63fb83cc8b344299ae9623b1180ce90f.pdf?index=trueIn PDF document text
    • http://woxesizefibugel.atwebpages.com/athens_tour_map.pdfIn PDF document text
    • http://viwudajokufado.atwebpages.com/creative_thinking_handbook.pdfIn PDF document text
    • http://xowilewegiwo.myartsonline.com/dametoxugiken.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/xawomubilozizoteduxib.pdfIn PDF document text
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_57fef84dfb144f8c831152d297668fbb.pdf?index=trueIn PDF document text
    • http://dolinoko.atwebpages.com/butipur.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_off00010d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9D 5856 bytes
SHA-256: 438a39658a099f678cd9cc4759a398c40fdaee8f5c5f74e284badde5b8a08886
font_01_sfnt_off00012191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12191 11528 bytes
SHA-256: 6a84af57d0063be9aefac5cc4fa39981b4c687d80f231c1b20881bf6f0733a6f