Malicious PDF — malware analysis report

Static analysis result for SHA-256 52aebec1123bc631…

MALICIOUS

PDF

72.6 KB Created: 2021-01-12 00:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 21aae0bdcede02d3eb8a9187b62ab348 SHA-1: 35d33d9ba3059ae1383c50bd97e292cef524b865 SHA-256: 52aebec1123bc63136b3e44879415e1c8ffd3af566f44838ad15ef47c549acd4
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as 'https://ggtraff.ru/aws?utm_term=amadeus+pro+printer', are designed to lead users to potentially harmful websites. The ML classifier also strongly indicated maliciousness, supporting the overall assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/aws?utm_term=amadeus+pro+printer In PDF document text
    • https://site-1242803.mozfiles.com/files/1242803/44022685114.pdfIn PDF document text
    • https://site-1176701.mozfiles.com/files/1176701/12561470590.pdfIn PDF document text
    • https://site-1242670.mozfiles.com/files/1242670/best_airplay_device_android.pdfIn PDF document text
    • https://pagununida.weebly.com/uploads/1/3/4/8/134861868/f86e5a781c8d7c.pdfIn PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/tobufanenusora.pdfIn PDF document text
    • https://site-1168173.mozfiles.com/files/1168173/28618231214.pdfIn PDF document text
    • https://site-1168027.mozfiles.com/files/1168027/wolf_simulator_online_crazy_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5fb258baa106d.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/jamokaroxoj/68094493217.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/how_long_can_you_keep_chicken_in_the_freezer_after_the_expiration_date.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_off0000e1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B6 5064 bytes
SHA-256: 5f0d97045db9c34722ab9cbd64a2bf646ff98fd927fd2c083c22c424a5097a31
font_01_sfnt_off0000f2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D1 10224 bytes
SHA-256: 551be1e7bb03059beefc61388ee8f5a3f3a39c3e75ea2b26407f5db99027e56d

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