Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32ea09ebf375a78…

MALICIOUS

PDF

63.6 KB Created: 2020-12-05 07:18:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7b2ca02740585d8a3b910a8d0d82218a SHA-1: ef901a197a7b321a415a61dd5052955169f23bc4 SHA-256: a32ea09ebf375a782c61d511cc0e9a7e456adc9bb0a4ccdb04f741dc8e4668ea
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed for SEO manipulation or phishing. The primary URL, https://trafffi.ru/123?utm_term=broke+millennial+stop+scraping+by+and+get+your+financial+life+together+pdf+download, suggests a lure related to financial advice. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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://trafffi.ru/123?utm_term=broke+millennial+stop+scraping+by+and+get+your+financial+life+together+pdf+download PDF link annotation
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/43a349bf4de6ea5.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5f8e434254fc5.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/sefepeminusora-zezabenumek-masejunab.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/zafijixug_tufezebovelo_busekuf.pdfIn PDF document text
    • https://fowuwulavo.weebly.com/uploads/1/3/4/7/134754099/4458522.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/bolovopizonuki/goals_objectives_strategies_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5796765b-000c-417c-92de-7bb7dd7d2f8f/vuzuxasuwowubukazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8697d2-cb03-4cc2-a620-b3585e9bd0e5/81217586171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13e65d9f-4edd-4509-b1f8-b56f76aa0c0c/kewofovoxovulifutezi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37c6992c50b1a1e87d9cd/t/5fca872f99acb035a5a186df/1607108412198/bus_rush_1._0._1_download.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_off0000bab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB2 6016 bytes
SHA-256: fa476a6994268da290a9c7c977495b0c4808920ff5624c5b463eb25473621d31
font_01_sfnt_off0000cf16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF16 9988 bytes
SHA-256: a1662cadb728ee5bee1d36b093045cb57477b64a6b28911604ce2ee6d1122adc

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