Malicious PDF — malware analysis report

Static analysis result for SHA-256 58190329b253f3ee…

MALICIOUS

PDF

76.5 KB Created: 2021-01-11 23:13:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0303ebd4f01bc3c78306328b42475717 SHA-1: 39b121f8115147566266951c94bdb24a01853797 SHA-256: 58190329b253f3eefb2a472178b34c0499de59db5fadaf7fcb6ebb60ff9ffd0a
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'meeting template'. The presence of numerous links and the ML classifier's high confidence score indicate a malicious intent, likely to lead users to phishing sites or download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://traffine.ru/aws?utm_term=new+manager+meeting+template In PDF document text
    • https://site-1166673.mozfiles.com/files/1166673/diy_pom_pom_pokemon_book.pdfIn PDF document text
    • https://cdn.sqhk.co/dopemeve/ehUibkg/95217154399.pdfIn PDF document text
    • https://zarimuxeve.weebly.com/uploads/1/3/4/8/134897304/diwiruketupam-moledefilatozex.pdfIn PDF document text
    • https://karubidodofibe.weebly.com/uploads/1/3/4/3/134316277/261786.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/pejenojesiju_leridibo_dololojonixes.pdfIn PDF document text
    • https://site-1176931.mozfiles.com/files/1176931/greatest_southern_rock_songs_of_the_70s.pdfIn PDF document text
    • https://site-1176532.mozfiles.com/files/1176532/winufumesagu.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/jcXjeGs/62208840323.pdfIn PDF document text
    • https://cdn.sqhk.co/jomurozop/gdkArjj/26585287696.pdfIn PDF document text
    • https://site-1174676.mozfiles.com/files/1174676/verizon_cloud_text_message_restore.pdfIn PDF document text
    • https://site-1178773.mozfiles.com/files/1178773/kamugegoridaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mijumomub/silicone_rubber_sheet_manufacturers_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/5884602492.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/wadajezukavigipurila.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE444 4700 bytes
SHA-256: c7ac6a3d1cbeb267e1af1af2df2c5f41c7258bc517b28e5e69ac3aabaedfe0bb
font_01_sfnt_off0000f427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF427 10488 bytes
SHA-256: 2acd9969c1f6a662cd6c15c75283eeaff1d2b0d7d74e5f2f42165941feda60ec
font_02_sfnt_off00011788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11788 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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