Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27ac7edbc1c298a…

MALICIOUS

PDF

83.6 KB Created: 2021-03-16 19:47:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fbedd23c0604bb9f5469db1fdeb8a9bf SHA-1: 57c0870fc974ac5817aa2b559fbc437703e7fbd6 SHA-256: e27ac7edbc1c298a672bd57668346380267c77d509c684662be477b3d52a6096
186 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 0.9998

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.
  • 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.
  • 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://gimoguvi.ru/123?utm_term=anime+gyouten+ningen+batsealer PDF link annotation
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/jitokilafix.pdfIn PDF document text
    • https://xonaxeritugu.weebly.com/uploads/1/3/0/7/130739926/6659805.pdfIn PDF document text
    • http://kakaxazirobolob.iblogger.org/loderun.pdfIn PDF document text
    • https://madumowa.weebly.com/uploads/1/3/2/7/132710776/nusilurido-jofedopepu.pdfIn PDF document text
    • https://bowulujakem.weebly.com/uploads/1/3/1/0/131069806/85c647a70f333.pdfIn PDF document text
    • https://vomanoxugorufo.weebly.com/uploads/1/3/5/3/135331351/2783d30646e6ee.pdfIn PDF document text
    • http://podorokufexapal.iblogger.org/camera_formatted_sd_card_recovery.pdfIn PDF document text
    • http://muvisaxof.iblogger.org/embroidery_designs_free_download.pdfIn PDF document text
    • https://xudapunazegiwav.weebly.com/uploads/1/3/2/7/132741045/b88413.pdfIn PDF document text
    • https://rogubofiduga.weebly.com/uploads/1/3/1/0/131069879/vejamowijumokabepel.pdfIn PDF document text
    • http://vewisono.iblogger.org/javascript_learning_free_download.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/rabewiruzitewa/romode.pdfIn PDF document text
    • http://sedukoxiwu.epizy.com/59301346767.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/tebabadetinujamu.pdfIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_87fb3331b2d3421f891ed0d65834c594.pdf?index=trueIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_b05b29b4f58843d8970cc11e03c056fd.pdf?index=trueIn PDF document text
    • http://mitofozajibo.rf.gd/bluestacks_for_windows_free_full_version.pdfIn PDF document text
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_56dbc2609bca4d6682c660f5572f38b5.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98B 8988 bytes
SHA-256: 218a2535d156f745ac6d87936fec26967e69e47e7464ce6747fbe5e58a2f7e2b
font_01_sfnt_off000107dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DD 5236 bytes
SHA-256: 3beda748e226ce3679baa1a0a25dccb989d7d9aeb7328010ed08d231ca99dcf3
font_02_sfnt_off000119a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A1 11688 bytes
SHA-256: 0d753eaa11595dacb48641aa4b6482df0429cc45a326bde920bf9354bc2d82ff

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