Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cbd40e433844d8…

MALICIOUS

PDF

75.3 KB Created: 2021-04-06 11:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 508f11559e097f72a8db28ad5923330e SHA-1: e197774cd64c9187d7baa325a4cccdeb555029e9 SHA-256: 14cbd40e433844d8765ba55722df53e7b3a860324fece754918f8844aa7904bc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or distribution mechanism. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of an attempt to redirect users to malicious content.

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://botokaw.ru/aws?utm_term=fantastic+fan+vent+cover+installation PDF link annotation
    • http://wubowobipevoto.mywebcommunity.org/66752873014.pdfIn PDF document text
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/7123f59.pdfIn PDF document text
    • https://vonorakukipi.weebly.com/uploads/1/3/4/7/134721252/7747054.pdfIn PDF document text
    • https://pabifiliponisod.weebly.com/uploads/1/3/4/3/134367040/b88784c.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/kugavemewej-vatimixin-kugafowusatigux.pdfIn PDF document text
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/gavupuzuboriva_tiwewa.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/4075542.pdfIn PDF document text
    • http://mewudaguzexo.sportsontheweb.net/tevoganux.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/40474664027.pdfIn PDF document text
    • https://dotitikedobe.weebly.com/uploads/1/3/4/4/134493035/30fe73cf9acef.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/limepusotanal/windows_server_2012_r2.pdfIn PDF document text
    • http://bafuwujix.atwebpages.com/the_good_the_bad_and_the_ugly_sheet_music_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216139cb-ea95-4670-b250-5c900add931c/how_to_make_a_quick_and_easy_flip_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/it_manager_technical_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/wepofe.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/fiat_tipo_android_auto_aggiornamento.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/carcinomatosis_peritoneal_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/63615943108.pdfIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/13814539955.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/sewebenomadeparad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ca630d-1abd-4e33-a7de-55bc266305ad/list_any_3_characteristics_of_living_things.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/zumodakoxogex.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_off0000eb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4D 4888 bytes
SHA-256: 71062bee4cbc814bd35442595d09727169f66287a997e0169afc952798d800ac
font_01_sfnt_off0000fc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC07 10520 bytes
SHA-256: 87bf2c6f34375e277f24f2dd66602a78a6a0e61ac8f7b429507e002dd9fe6d86

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