Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eecb1a133c02148…

MALICIOUS

PDF

75.0 KB Created: 2021-03-24 10:24:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f84516a7f79ab050af4529aad712bbae SHA-1: 10c7a64bbf33ce6ef4b32d3e77ce627cd3b97684 SHA-256: 2eecb1a133c02148299331b87aa07b490e2c87b4f59beaef158e8559ed4c144d
176 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM'. Several of these links point to unknown or potentially malicious domains, suggesting a phishing or malicious content distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ponafet.ru/123?utm_term=angoisse+de+performance+traitement
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/patovejumexeri-liluvefig-desedojegi-rilovavixun.pdf
    • http://quickpapp.online/video_player_for_laptop_windows_7sqn7j.pdf
    • https://sojagimizalafar.weebly.com/uploads/1/3/5/3/135317111/nofugezineta.pdf
    • http://moneymaya.site/45884877511rksst.pdf
    • https://jitivafume.weebly.com/uploads/1/3/0/9/130969372/3822269.pdf
    • https://sutevanu.weebly.com/uploads/1/3/4/7/134770908/5675946.pdf
    • http://eurostore.info/28623811305i4j01.pdf
    • https://xuropowupenuba.weebly.com/uploads/1/3/0/8/130813979/jaxipafuseril.pdf
    • http://awpmode.com/xepapumurunenaxatariln1xq.pdf
    • http://teenagetutor.online/88251452806ldzeu.pdf
    • https://tajerupabud.weebly.com/uploads/1/3/1/1/131164315/wakowidej.pdf
    • http://summ-ita.space/507080564016d2cx.pdf
    • http://ragukir.iblogger.org/kudupumobukemujujap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/921859f0-0ff6-4f9e-8446-f02ade8aca15/what_is_dynamic_port_security.pdf
    • https://uploads.strikinglycdn.com/files/54bb8b48-26a9-47ed-b60c-a5897bbf569f/35185738506.pdf
    • http://livofos.epizy.com/41244428110.pdf
    • https://uploads.strikinglycdn.com/files/97f1de6d-5b35-44e6-bf54-33efe2c31383/98022500983.pdf
    • https://uploads.strikinglycdn.com/files/0ed9a694-2d48-4cd1-b541-68bc2483fdda/what_is_another_name_for_multiplication.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e60f.bin
9ae868b39710519e60262df7b57c5159197fac725b11fd8960f838008b1b6fdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE60F 5432 bytes
font_01_sfnt_off0000f877.bin
3e00e94aa2259918530f1e7f4d555dc8f4ab361d90caf381b3724e2461acb9bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF877 11696 bytes

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