Malicious PDF — malware analysis report

Static analysis result for SHA-256 24568cb7e848c887…

MALICIOUS

PDF

79.8 KB Created: 2021-03-23 14:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2e741a7fb7ee80674970971fbc81d5ff SHA-1: 6c9a6d693b6c8e03dac716fd91d4498d8b34aaab SHA-256: 24568cb7e848c887dec9f8f0ca2e660077d5b2d9728bc923657b085132cc7c52
156 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating a link farm with numerous external PDF links, and one specific URL is presented in the document body. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external links points to a common attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/wix?keyword=young+dolph+major+lyrics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484363/normal_5fecad579d37c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5fdb7f0e31cb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5fcdaa561c60d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418791/normal_603e1812a4075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484118/normal_5fc7fd1cd06e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kutifakibidi.rf.gd/orchestration_music.pdfIn PDF document text
    • https://ea0a6730-5b47-42bc-899c-5b27b21b32ea.filesusr.com/ugd/184298_16de6c2f6d7f430abe5d6c085bc9c9b1.pdf?index=trueIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_256c92bb7a67415198255b72233ee090.pdf?index=trueIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_03ea8e0ce0fa4ca58b91d115473f1ea7.pdf?index=trueIn PDF document text
    • http://duwazobikojuk.epizy.com/mathematics_textbook_for_class_8.pdfIn PDF document text
    • http://wenuwobowikowax.rf.gd/it_novel_pennywise_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/babylon_5_tv_series_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/fipukewotazumakap.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/vawusede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d8128d-3674-4fd3-88c3-0a2cc84f15c3/ramigagovaxeb.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/46937016747.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_da32e0a32ab947e6beed0c7643ff772f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49cd0aa4-2b40-4d33-bfa8-a8fc44cb7780/attachments_rainbow_rowell_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/summoners_war_homunculus_support_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/delicious_emily_s_holiday_season_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/midiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c58801-54f5-4197-8f4e-54aebb0c9b53/somnus_dreadwood_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/nodanoxewiwimoxonivupaleb.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/complete_pet_teacher_s_book.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/gram_video_ig.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_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 5628 bytes
SHA-256: 0f7436395fe2ff3ac15b6f65b26678edf2bccfc3c0660e316d0b016c8f0c4913
font_01_sfnt_off00010c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5A 11252 bytes
SHA-256: 6bcf1c42c73798f3339fc9a570568648c276247ed597b7855006ad20da61a053

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