Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f46bfda98f51238…

MALICIOUS

PDF

66.7 KB Created: 2020-11-17 17:08:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1256dc72883e209ef0759b3e0884cb12 SHA-1: 9b6e47e71f43a953ff82dc2c11d0cfa5176550e3 SHA-256: 1f46bfda98f512384ecdbdd76de26099ef523f678141153a276e0e70652c3232
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are the primary indicators of compromise, pointing to potentially malicious destinations.

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://traffset.ru/strik?utm_term=tabla+de+densidades+de+metales+en+g%252Fcm3 PDF link annotation
    • https://fupefasupemeze.weebly.com/uploads/1/3/4/3/134315788/wopilez_mefasivonowemo_naboj_pelasupopemara.pdfIn PDF document text
    • https://niwejeru.weebly.com/uploads/1/3/4/3/134308800/nixitegilamije.pdfIn PDF document text
    • https://lisamotakix.weebly.com/uploads/1/3/4/3/134308999/xasasatugut.pdfIn PDF document text
    • https://kotonimurapuva.weebly.com/uploads/1/3/4/4/134440920/1851172.pdfIn PDF document text
    • https://wesojejupeledaw.weebly.com/uploads/1/3/4/4/134446418/jibabe.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/naxikezomafizaw.pdfIn PDF document text
    • https://lalazifesulalo.weebly.com/uploads/1/3/4/5/134502535/7212094.pdfIn PDF document text
    • https://tapebosipufadiz.weebly.com/uploads/1/3/4/3/134366988/padaf.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/334ca235ef4.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/0cf5f4d4-73ed-42e4-801f-410512688093/xisesojuxupeguzuveres.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a467325c-ba3e-495c-a395-8c964277294f/boxij.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/gisop.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/true_slim_garcinia_cambogia.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_off0000afcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCD 5452 bytes
SHA-256: a72101cbac8247a3c5c28b346d394f1b8318d8c9f3c0f650f42bc14b291cfce3
font_01_sfnt_off0000c253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC253 11184 bytes
SHA-256: d7366841ddddaed05cac6fee439a8fe439fd1c4582c58367d2b1371708021d30
font_02_sfnt_off0000e6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BB 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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