Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d4bfcc7ce1c295…

MALICIOUS

PDF

68.8 KB Created: 2020-12-30 05:12:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0fe5baad34def7cd689169b063b9578f SHA-1: 37f3a2ab16857583e46e8f1242d08822ef476965 SHA-256: a5d4bfcc7ce1c295c14d86cf853a62288fef41b6ebf8f0cf7a7b623d12c5811e
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it likely serves as a lure for phishing or malware distribution. It contains numerous links to external websites, including a known malicious redirector, and is structured as a link farm. The embedded content, though obfuscated, suggests an attempt to disguise the malicious intent.

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
  • 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://traffking.ru/123?utm_term=nike+lifestyle+shoes In PDF document text
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/4299093.pdfIn PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/8887dec94e0.pdfIn PDF document text
    • https://vafomelopujoxo.weebly.com/uploads/1/3/4/8/134864043/c34b650f63230.pdfIn PDF document text
    • https://mozawexi.weebly.com/uploads/1/3/1/8/131856146/4138821.pdfIn PDF document text
    • https://bazawafamojuw.weebly.com/uploads/1/3/4/5/134508147/kumasakafenigawab.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/3722212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467927/normal_5fc3735677fd9.pdfIn PDF document text
    • https://cdn.sqhk.co/nalomuxe/4hEjf5x/bofikaw.pdfIn PDF document text
    • https://batarodev.weebly.com/uploads/1/3/1/3/131380453/45a77bf99a8c17.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/KISiihi/tie_dye_shirts_amazon_womens.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/4b5b0ead-e244-4493-8443-771358c94206/11287154791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7116e3e5-9f00-48ab-800a-9e855477884a/10752901720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b91ee889-854c-40e7-afe9-2b53a595cd90/57800636302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d4ec873-6508-4429-aa2f-86d2e12716cc/music_staff_notes_quiz.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_off0000d086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD086 4684 bytes
SHA-256: 43d450f60e889ebe435b04a232b0b1e2e3ac6bd6a1801cb9ccb9fd5f38610778
font_01_sfnt_off0000e08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08C 11112 bytes
SHA-256: ce888a473746e3ec33672af0a3dde50be7b9bc8b09a1d2d32839ffa76d500421

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