Malicious PDF — malware analysis report

Static analysis result for SHA-256 569f916d18df5f38…

MALICIOUS

PDF

113.1 KB Created: 2021-05-13 07:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4e1ae10ac728a0d8a642245d8e4216ef SHA-1: ec8bcde1d0ac4651a3b1ce877427806ffe722da7 SHA-256: 569f916d18df5f38d30c72d179cf05f024f0464d5d57f54d93d8c4d2eb7036ca
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 0.9996

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/strik?utm_term=aikido+the+art+of+peace+pdf PDF link annotation
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/pemavifetir-fejuti-nupewo.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/docsend_download.pdfIn PDF document text
    • https://tebuwopelovenep.weebly.com/uploads/1/3/1/4/131453198/kosigil_joviseketawaz_nidag.pdfIn PDF document text
    • https://fujazilumekopel.weebly.com/uploads/1/3/2/6/132681311/surikonazup-favir-nawimife-zabizu.pdfIn PDF document text
    • https://wagigezo.weebly.com/uploads/1/3/0/7/130775958/lejab-kozalawujo-rupowinap.pdfIn PDF document text
    • https://nogisapu.weebly.com/uploads/1/3/1/4/131453993/5491033.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/gulaxukanimuxi.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/sumesawoxajew/htc_android_9_update_list.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/iso-_ne_celt_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/akshay_kumar_video_song_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bbac36-2b86-46e7-8518-37c4c511ae39/70521225632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c9aeaf-1534-4235-8d59-9eb61ce21630/let_teenager_try_adulthood_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/zorinororebadenol.pdfIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_2f706c56397b42b8a79984c4c77528e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ecb67e-b672-4056-981f-d0640174df9b/laserjet_m1212nf_mfp_toner_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/manual_de_bacteriologia_facmed.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/supavipizekomolokoga.pdfIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_0f490f38c2f8484794d40af621a4018a.pdf?index=trueIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_a8431456aafb4e698111191341f3b328.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddae157e-b182-426a-a8df-cac8f4602700/density_virtual_lab_answer_key.pdfIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_67485f35306147b2a7ac09cf0cac012c.pdf?index=trueIn PDF document text
    • http://vedixemalirugi.atwebpages.com/capture_one_tutorial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EDB 9512 bytes
SHA-256: 31427be4ac261b32a28f04f048483c3893432838ad781c2559c604aa8505ab25
font_01_sfnt_off00017e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E50 5088 bytes
SHA-256: 1620e9708b87f84c6d7adb66bd78548ed15eb6ec6f52b9d20be532018228240b
font_02_sfnt_off00018f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F9B 11916 bytes
SHA-256: 39d437701c07a55f890cbed650ae3c365b813c91fe4581a457caa1015f77f915

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