Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b20b9cbc6dc6e8b…

MALICIOUS

PDF

83.5 KB Created: 2021-05-02 02:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3125c576e5297e04c0f92e1843f4906c SHA-1: 8b41e29e0cf4612c7eada6321ffb3686d2afe170 SHA-256: 7b20b9cbc6dc6e8bdd85147acddb618fe3eb99816d9d02ce37d467dc1391f767
156 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 0.9994

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://mezovuduw.ru/strik?utm_term=what+are+the+main+arguments+for+the+existence+of+god PDF link annotation
    • https://toxekemugig.weebly.com/uploads/1/3/4/4/134484635/4415159.pdfIn PDF document text
    • https://nisuwifa.weebly.com/uploads/1/3/1/4/131453943/simomibamujara_nupatojagor_fiwil_takolejunigu.pdfIn PDF document text
    • http://santaparker.store/cyclebar_membership_discountyqyth.pdfIn PDF document text
    • https://tubababekegoso.weebly.com/uploads/1/3/4/8/134880125/timenab.pdfIn PDF document text
    • http://redtea.space/emulator_nintendo_switch_untuk_android8s71e.pdfIn PDF document text
    • http://iminn.ru/46870981579b5g82.pdfIn PDF document text
    • http://creditscorehelp.info/328932192606yx7g.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/how_to_explain_a_writers_tone.pdfIn PDF document text
    • http://bigtittybella.com/lajexudigeriqwzan.pdfIn PDF document text
    • http://zutelotojenexop.getenjoyment.net/51716731915.pdfIn PDF document text
    • https://vizokajobekaxa.weebly.com/uploads/1/3/0/9/130969885/pavadumivivolibazadu.pdfIn PDF document text
    • http://rajajime.mypressonline.com/computer_organization_and_design_chapter_4_solutions.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/getizar/kolopuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/vasadifijerizupumigumut.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/lofafigewixipubuj.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/how_to_set_up_a_legal_trust.pdfIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_4cff4adc34dd49f1981bcbe5b4f29edb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lulelepese/are_there_doctors_who_make_house_calls.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/xavugenikiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/92514738582.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_254c9f1894ff4fc8b4094a830802bdd8.pdf?index=trueIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_70468e9953bc42b28c6062709688b242.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nemafu/5360638759.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_off000107e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E7 5484 bytes
SHA-256: a12337fdd2fd941b198528a58791d97bbc1b27d440d0ce4d24d480540072fad6
font_01_sfnt_off00011a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A76 11120 bytes
SHA-256: e83715be2b1198e446b014cf2edbfa530691c3d24215387a0cea724872d2d934

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