Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8e9edc29cf4824…

MALICIOUS

PDF

86.5 KB Created: 2021-04-23 23:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7c519bc73a9e389ec1621ee91f6dd723 SHA-1: 90be8c16e46fb03e21b40fbbb701c4d5b0dc6794 SHA-256: 4e8e9edc29cf4824f0328d392e17def958261ad3b243800021684480606d59c1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=what+should+a+bulking+diet+consist+of PDF link annotation
    • https://nugaruxiboxora.weebly.com/uploads/1/3/0/7/130738781/5c98f8.pdfIn PDF document text
    • https://tanatomunedasov.weebly.com/uploads/1/3/5/3/135325499/remuxufubaz-risisu.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/8f5e5.pdfIn PDF document text
    • http://summ-green.fun/learn_macedonian_language6m8lu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404739/normal_600a4b71342d7.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://zatodawu.iblogger.org/panasonic_kx-tgp550t04_firmware.pdfIn PDF document text
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/xazeberomebixotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446931/normal_60478b2136d33.pdfIn PDF document text
    • http://gradstroy.su/sistema_binario_octal_y_hexadecimalayxmn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491426/normal_602422dbf1923.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/mozedijiz/tatikojolulepavakekeguxut.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/pilafuxolevalelefibaroruf.pdfIn PDF document text
    • http://tetuzufolotozop.epizy.com/class_4_english_grammar_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/agneepath_video_songs_hd_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/telecharger_antivirus_gratuit_pour_samsung_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/21305095002.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/33394345456.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/40132597708.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/vba_set_active_worksheet_name.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/98965657286.pdfIn PDF document text
    • http://joboberunora.rf.gd/arrive_guidelines_nc3rs.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/19016240849.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F1 5404 bytes
SHA-256: 18b90bef752ff9f0fbef0f461801512899a96be98faddb040f00e1fc110b7dbe
font_01_sfnt_off00012662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12662 10732 bytes
SHA-256: 5173ac65c9cfca92866c91800436309e7d173f1ff458b22a01cd9774362151a5

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