Malicious PDF — malware analysis report

Static analysis result for SHA-256 2053aeac8237181c…

MALICIOUS

PDF

73.4 KB Created: 2021-06-02 08:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 453ec8fac51354a230ec2dd42f6980d5 SHA-1: 01e1308a1e242c8ceb58a449e8bc86db1f2f6df8 SHA-256: 2053aeac8237181c96566137961a218733a6857fce30ab435ad6fbc3a3b81d1a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'https://archism.ru/pbw?utm_term=lalitha+sahasranamam+chanting+benefits+in+telugu', which is likely part of a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://archism.ru/pbw?utm_term=lalitha+sahasranamam+chanting+benefits+in+telugu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419629/normal_6035cc2f16f1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_600daf472f693.pdfIn PDF document text
    • https://xojozojejaxito.weebly.com/uploads/1/3/4/8/134866115/3d9b1421242.pdfIn PDF document text
    • https://wimixexaselu.weebly.com/uploads/1/3/4/3/134324609/mukewedalub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_6026a9a54121c.pdfIn PDF document text
    • https://pedomolakikivo.weebly.com/uploads/1/3/4/4/134440841/lovidisil-zoresitag.pdfIn PDF document text
    • https://fusodozot.weebly.com/uploads/1/3/4/0/134096428/nabifudarosav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cefe642d-bb0e-4e2e-bdc3-0d3d36b1f92a/28192145003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3046b5c5-1bcc-4eaf-940e-aaede38af14a/82184160422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce615da-ce3b-4891-be5e-102729c7c692/investigative_journalist_meaning_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b830911a-cd6c-4af6-a015-81cd23bd7348/how_to_remove_activation_lock_on_ipod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f7571e0-3850-4b6a-af10-7dc0fdacef0b/estudios_de_casos_y_controles_epidemiologia_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aecb469-6b9a-44c8-b873-76dc0cd99909/honda_hrx217k5vka_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94f73b5e-e525-4dbf-ad65-41aa9ff738da/wukulevatutugases.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c34210d6-0f16-4fcc-b2bd-94bc57c2d638/85313475062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f90403-a504-47ec-a6eb-5baeb73faad8/guzabuvorigafirinutejib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a5a5ef9-b3f5-470d-b712-8fb2847ebfa2/77643395478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ffc8023-dee6-4deb-b618-0cffcf642434/nubejozevutubudapipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c251f1a-61ea-4e31-977d-777982267204/52324675960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c9ee6d0-18b2-4a6b-bcef-dfb5acc79fa6/raxopawube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533dd84c-4dac-460c-88c5-d518c0189405/99913337697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f94348-f615-4d72-99e9-dae1dab0b505/pinizijeji.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_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 5376 bytes
SHA-256: 9786fc17ff4d270f3df6b2dc76176940b45c0955c44085f1f04b22a5aec37239
font_01_sfnt_off0000f516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF516 10140 bytes
SHA-256: a38ffa10e84577a0a35c3493dfe81de21f913ef0ca0276242e532cb7ad5e3211