Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fed40d796f53a2…

MALICIOUS

PDF

76.5 KB Created: 2021-01-23 00:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d93b0c18ed203c88657efe7f1e197736 SHA-1: eb4147ebe1d8b1cf4745deef04701d16c69d3a5e SHA-256: e5fed40d796f53a208df70bab56e66131e86abc61513c0eaf0093b1c4798ba7d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing campaigns. ClamAV detection and ML classification strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=sun+city+palm+desert PDF link annotation
    • https://cdn.sqhk.co/vapatibu/bnjji1R/sojosopuguroneniwax.pdfIn PDF document text
    • https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/2007956.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/jebodumanufeta-xapidukem-kugigofafil-golijikifofopa.pdfIn PDF document text
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/zowetebilajul-vimivux.pdfIn PDF document text
    • https://vuvuzuvikedatun.weebly.com/uploads/1/3/4/5/134529562/rujotiz-kopapuxawuzugax-gejumupozubokur-xosan.pdfIn PDF document text
    • https://bopexetijajab.weebly.com/uploads/1/3/1/4/131411078/suvugoteresipilujuja.pdfIn PDF document text
    • https://kisuwirabavaruz.weebly.com/uploads/1/3/3/9/133999170/c87d54c34.pdfIn PDF document text
    • https://lobogisotu.weebly.com/uploads/1/3/4/8/134870795/raresonute.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/bemutolubiza_lipamewebuxa.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/tipikaxe/free_sample_aptitude_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/insider_growth_management_platform_glassdoor.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/28986651730.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/ship_safety_management_system_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/pehle_kabhi_song_baghban_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/defanigejano.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/guided_imagery_therapy_at_home.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_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 5424 bytes
SHA-256: 74c07d5b056a526567ad7ef8bf186d109922982a6248bb521e3a22fa9d7d3c3d
font_01_sfnt_off0000fdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEB 11356 bytes
SHA-256: cae12799e2e9c69051a034464b70b05c65e993a8e332493aab009bfb4bcce61a

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