Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee1d95cb1fb5f4f…

MALICIOUS

PDF

68.8 KB Created: 2021-01-17 20:02:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1a506727a314de715db440d3545064f4 SHA-1: b6b231e27c67b4682a8bcdf110cc8b95562b9500 SHA-256: fee1d95cb1fb5f4f9af7430015e343f78fbe001f5bb508dbf659cf294f2ba504
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, including one pointing to 'trafficel.ru', suggests it functions as a lure to external phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with common phishing techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafficel.ru/123?utm_term=criteria+of+cgpa+by+hec PDF link annotation
    • https://site-1187467.mozfiles.com/files/1187467/zovamubajometireg.pdfIn PDF document text
    • https://site-1178057.mozfiles.com/files/1178057/78187857571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501995/normal_5fb02a542e18c.pdfIn PDF document text
    • https://site-1247884.mozfiles.com/files/1247884/56408234105.pdfIn PDF document text
    • https://site-1215985.mozfiles.com/files/1215985/61756454880.pdfIn PDF document text
    • https://site-1175555.mozfiles.com/files/1175555/neloxuzajaxonexuwiperiru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425507/normal_5fc550ac493c7.pdfIn PDF document text
    • https://site-1172607.mozfiles.com/files/1172607/busy_warszawa_biala_podlaska_garden_service.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5fb3d8cab2778.pdfIn PDF document text
    • https://site-1174360.mozfiles.com/files/1174360/38469009211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369161/normal_60036c8bc56a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_5f96041056636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451028/normal_5fc1feac7bc74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_5f8e98cb76b8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409393/normal_5fa98d9577e08.pdfIn PDF document text
    • https://site-1194666.mozfiles.com/files/1194666/93181064663.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/julexekubaj/html_to_python_package.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_off0000c245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC245 5016 bytes
SHA-256: f26bf47dccaa31e7b246918f61fcad459af1e83e6fd56c315891bf4493f2c1f8
font_01_sfnt_off0000d372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD372 10772 bytes
SHA-256: e309cab2374209fe00262e9d4ebd2cee6ccc4173f071ca490571e39ae161e86c
font_02_sfnt_off0000f851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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