Malicious PDF — malware analysis report

Static analysis result for SHA-256 047da532fc1b2933…

MALICIOUS

PDF

59.3 KB Created: 2020-11-21 17:18:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a389396c593f106995d586b29258a5d5 SHA-1: b53a8af8868f9a211752e8acb58443a2f5e17f03 SHA-256: 047da532fc1b2933ff7525b6b5180d4185b95a07a3f9f098bc834d055dab8f65
244 Risk Score

Malware Insights

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

This PDF document contains a significant number of embedded links, many pointing to disposable hosting and redirector services, indicating a link farm or phishing attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were directly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious content, potentially for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=donkey+kong+country+gba+rom In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f9cf2881b0ca.pdfIn PDF document text
    • https://furasawi.weebly.com/uploads/1/3/4/3/134308809/8357042.pdfIn PDF document text
    • https://waleberof.weebly.com/uploads/1/3/4/3/134385841/816bc7c10e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475216/normal_5fb2b9490e084.pdfIn PDF document text
    • https://ragivigelogupow.weebly.com/uploads/1/3/4/5/134525503/1d02ec.pdfIn PDF document text
    • https://mekujukoner.weebly.com/uploads/1/3/4/7/134715553/7c7d6edee1900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495391/normal_5fac55b159202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5faef207accb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_5fa3311c0fe7a.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5fa54a62078ca.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/jozetej/ielts_reading_test_with_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab829077-db97-4816-a82c-a3bcc64323ca/66690532025.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/dajifevawupusofolipukewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a942767-21aa-4397-ab2a-0bf08fb5a216/14447906980.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_off0000ae04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE04 5216 bytes
SHA-256: 8ceb326203e0720e4469df22670439504dda5711bcabcd8851b92d4d39a797aa
font_01_sfnt_off0000bfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCC 9496 bytes
SHA-256: 0768aaede82d299021428ad00d2e7546b3dfd4d69735c140abc4f16c190d0baa

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