Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f119b302f8bb55…

MALICIOUS

PDF

92.7 KB Created: 2020-12-23 04:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f486ac369ae556363ab3db3eff8ebb89 SHA-1: eb99277c83d39fafbefe44465705d16e1bcd35b3 SHA-256: 48f119b302f8bb552a083e70559c7b7978db27c497b40d1eb8ee52cd72bb46e8
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to reference a song title, suggesting a social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/strik?utm_term=mazel+tov+song+fiddler+on+the+roof In PDF document text
    • https://static.s123-cdn-static.com/uploads/4469143/normal_5fc855769f3fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5faaedc8cb331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375358/normal_5fb30c39bedf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374013/normal_5fdd76a526666.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/notifikarer.pdfIn PDF document text
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/luras_xogomapamojum_monano_pukule.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/6322259.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/vebetomutegokafa.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/saxove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474231/normal_5fa4b66f8ffa0.pdfIn PDF document text
    • https://lewotivegil.weebly.com/uploads/1/3/4/3/134320996/natebe.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/8fbf0bef-b282-4b86-8f59-7626cdc1b2d1/33314364832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ca0f27-ab69-47b0-be5a-13fcd9b3473d/74858306824.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/airdroid_activation_code_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7e9249-51ac-4436-84bb-2aea6260757a/how_to_restart_warframe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473db8f4-e5e9-4d32-9449-d188ca62a216/silver_palate_sauce_review.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11769 5284 bytes
SHA-256: 31bad195fe817f64e98e188bbaa3b6db0c7c8c811936b2173a0f5d979aaa7669
font_01_sfnt_off0001297a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297A 11596 bytes
SHA-256: c2c5b3f1ac3e16346f487a06d504a1119210e1f6c5a083ebde4d20137c0566c4
font_02_sfnt_off000150e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E5 16028 bytes
SHA-256: 13adf508137d8c465935a7a142060f5d940462760dc3fd3f5061e956d2f2222b

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