Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54fcc284fa01877…

MALICIOUS

PDF

79.6 KB Created: 2021-02-08 06:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 912c5932d7d16ead969eec4c2d3313a4 SHA-1: 71faeab7f4f7cbfa8c10cb46c37862c8a16bd2a1 SHA-256: c54fcc284fa01877f7e4c505e0437fc8cfb9ec57cf606be4eae0ef30470edb7f
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 pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://jottigo.ru/aws?utm_term=aquaman+movie+songs PDF link annotation
    • https://kegebexik.weebly.com/uploads/1/3/4/5/134590944/bazeru_vanuwifusabub_vasotozegeton.pdfIn PDF document text
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/suxafubojigebu.pdfIn PDF document text
    • https://bivesazi.weebly.com/uploads/1/3/4/6/134652180/siridekidip_delamavez_niwatel.pdfIn PDF document text
    • http://fortuneocredit.com/94600088684f777u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5fe7ed14d1ea7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408599/normal_5fe4e972f2580.pdfIn PDF document text
    • https://xibabajawaxas.weebly.com/uploads/1/3/1/3/131398380/9400275.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/duwuragobabivurikive.pdfIn PDF document text
    • http://mbfsopg.com/bowling_western_ave_chicago_shootingspf0a.pdfIn PDF document text
    • https://xilamexazoleguj.weebly.com/uploads/1/3/2/6/132695560/2204598.pdfIn PDF document text
    • http://pressit.space/fufodopivezefepizajarijbmbu6.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/3538795.pdfIn PDF document text
    • http://vinorama.fun/causal_analysis_essayyqlqv.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/fewifuwu/66788023160.pdfIn PDF document text
    • http://dasowarixolusix.rf.gd/digital_certificate_pendency_report.pdfIn PDF document text
    • http://xezepagonozaniw.epizy.com/free_online_baby_shower_invitations_templates.pdfIn PDF document text
    • http://sukasorepej.rf.gd/blank_bookmark_template_publisher.pdfIn PDF document text
    • http://doliwoxebokuk.rf.gd/bushnell_hybrid_laser_gps_rangefinder_manual.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCA 5052 bytes
SHA-256: f84e1521fd82da083c007d116cf4637233a122052d7451264bae5cc3e9e4fe17
font_01_sfnt_off000100f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F1 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00010c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C54 10856 bytes
SHA-256: 3ca5af01a0c5f7c3d1e71fb1abe91f9aa6f1c83fe939c21ba7c21db6f5d5d0f2

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