Malicious PDF — malware analysis report

Static analysis result for SHA-256 2819a4afd10d3ce7…

MALICIOUS

PDF

70.8 KB Created: 2020-12-28 20:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 93744e9f902d8b425f7c99376844512b SHA-1: cec3856bad7fc38a86fda6356818ce0e91ec9f8e SHA-256: 2819a4afd10d3ce713c0a9c04e62673792d9123ef55e6a6f5c829404469e9aff
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farm or phishing attacks. The ML classifier and ClamAV detection strongly indicate maliciousness, with the PDF_SEO_LINK_FARM heuristic pointing to a large number of generated links. The embedded URL 'https://trafffi.ru/aws?utm_term=google+local+guide+fake+reviews' suggests a lure related to Google local guides, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/aws?utm_term=google+local+guide+fake+reviews PDF link annotation
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/rukorobukojudakarexa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460473/normal_5fad986eaa9ae.pdfIn PDF document text
    • https://turetufifej.weebly.com/uploads/1/3/4/5/134500159/4aeeb.pdfIn PDF document text
    • https://geserani.weebly.com/uploads/1/3/4/3/134347405/zitamamawogam.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/40b808dd9b7.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/Rhdhhl6/bubblegum_haroinfather.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/f5d6bd02-e214-4682-90eb-57e1f8f18fea/artpop_zip_lady_gaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c0163e-d3e1-4d49-ac43-ceae616bd530/9095593477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ea6fd4-a35a-4bb7-a58d-4885a6004aa4/nulunozajonub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a09a10-e823-417d-845c-0850adb5b338/zidegepejimijaxekupowutum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ceba916-abac-49cc-9203-26882fb57da2/dickens_village_price_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b0eb88-5d43-41ea-9d21-45cead3b7a90/cuadernos_digitales_aula_31.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/408176a1-50a0-47e8-84f1-7f00abab0d17/fofoliwozitemojozezolasu.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_off0000d7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B0 5436 bytes
SHA-256: a2c05da0ac394f0387016e020f35b9f6a0baa8de7f299281b7a4a372e89c499e
font_01_sfnt_off0000ea5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5F 10948 bytes
SHA-256: 8a093c90b1b74c1fa4478ece199d6305581b375c8a9cccd64f70e76c0004c61a

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