Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd28264e5942d8c3…

MALICIOUS

PDF

74.4 KB Created: 2021-02-27 04:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 3c3dd723dec6b28d146f46d9f748ebc1 SHA-1: 7eb5530327bea577a2517318273870c8d1caf150 SHA-256: cd28264e5942d8c3eeae19a36f5261b26e54cc739890b0fd020a0eadf7177569
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=how+to+connect+schlage+lock PDF link annotation
    • https://givozerav.weebly.com/uploads/1/3/2/7/132710596/japijeruwufazefodif.pdfIn PDF document text
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/vunejazarip_fobeselasa_xisizenar_tefefeza.pdfIn PDF document text
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/fipifulifalineb.pdfIn PDF document text
    • https://xoburorabusu.weebly.com/uploads/1/3/0/7/130738623/9286377.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/vowafufelotedu.pdfIn PDF document text
    • https://moluxoket.weebly.com/uploads/1/3/2/6/132682852/e72f40d39f5965.pdfIn PDF document text
    • https://lanutitokoxoziv.weebly.com/uploads/1/3/4/0/134096970/kakidinaxo.pdfIn PDF document text
    • https://zagozejidenadap.weebly.com/uploads/1/3/1/4/131407028/5de48f60b0c5.pdfIn PDF document text
    • https://cdn.sqhk.co/bumegukomuza/dhgHifT/65998849515.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/gjihzjd/vexixotu.pdfIn PDF document text
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/6109772.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bujisovi.epizy.com/variedades_linguisticas_en_el_peru.pdfIn PDF document text
    • http://lopoduki.rf.gd/80448006216.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/new_movies_free_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/jujopokuwaf.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/29340953551.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/gowijiwore.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_off0000e750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 5084 bytes
SHA-256: 501f7af0d260e522f1ab14fb2e44d8d67aaf93051ef3ccd3ed95db1a5cd88b2b
font_01_sfnt_off0000f8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B2 10468 bytes
SHA-256: e8b2bfb6a4117c888e7deffdf47f0f097c6cc61bad21c155747d68dcab27894a

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