Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac290ee962036d8…

MALICIOUS

PDF

70.8 KB Created: 2020-11-11 08:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 065ab1e454124102c6cf3832e06aa34e SHA-1: 31983225434dcfc6775f8190fa8583f55ced8725 SHA-256: 8ac290ee962036d87fd11aa8884ebdfa559fe4d8e0285e9bec1434c5fe6b15c4
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many pointing to other PDF documents, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute further malware or phishing content. The primary malicious URL identified is https://traffnew.ru/123?keyword=spanish+to+english+word+list+with+pictures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/123?keyword=spanish+to+english+word+list+with+pictures PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f886c0ea56e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f8a4c2ea5bd2.pdfIn PDF document text
    • https://gugukufetufa.weebly.com/uploads/1/3/4/3/134337187/xevavo_xewume_notasufuj_sasirefive.pdfIn PDF document text
    • https://tuzigopidimeb.weebly.com/uploads/1/3/4/3/134320631/jewifajoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_5f9d77257d846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f9e3b1b150fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f8738fac3097.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/tusuwagejezoxi-pilazimuben-xosozefuxe-judaxegojojuxu.pdfIn PDF document text
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/9032611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f9f9c919b056.pdfIn PDF document text
    • https://siminanora.weebly.com/uploads/1/3/4/6/134611077/wunozukapepatazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401692/normal_5f95535bac27c.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/4b152e84-6c67-4643-bb14-513fc2937593/18764683178.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/xorezotupodotevifiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7161b38-e205-4d8a-a66b-6e4ddcc71d31/kawarevep.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/free_cloud_mining_sites.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_off0000d7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C2 5532 bytes
SHA-256: ee31df692cf43d1e36d1ac128d15ce93eaef375c9e40d49d4716e70bc0175d8e
font_01_sfnt_off0000ea9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9C 10336 bytes
SHA-256: 260068f45ecc64febd08da908dbba74492d33485ddbe4de96893a440005266dd

Open this report in the interactive analyzer, or submit your own file for analysis.