Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eae96a019457c39…

MALICIOUS

PDF

74.7 KB Created: 2021-03-06 10:23:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49ff3d9f3ccaf8a041ea7ee01322b4bc SHA-1: 1a19f526918940049a3a78e36f5b99c894e68e76 SHA-256: 6eae96a019457c39c3c1e75341110a7e1ec7b8a23feca5d1fd4bca0202b96c6a
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of the 'utm_term' parameter in one of the URLs indicates a potential tracking mechanism for phishing campaigns. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/123?utm_term=you+raise+me+up+easy+piano+sheet+music+free
    • https://cdn-cms.f-static.net/uploads/4454164/normal_5fdb21658f90c.pdf
    • http://guvorib.22web.org/bivovaj.pdf
    • https://tilakajunobeka.weebly.com/uploads/1/3/0/7/130739719/f3a72.pdf
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5ff360e4dca85.pdf
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/746a90.pdf
    • http://lofoluwa.iblogger.org/liradeka.pdf
    • https://tirawinuzupufe.weebly.com/uploads/1/3/4/4/134445233/5ba7f9e402.pdf
    • https://fujubonutebi.weebly.com/uploads/1/3/4/2/134266124/9488225.pdf
    • https://betivaronapan.weebly.com/uploads/1/3/5/3/135350750/fedigusifesafel.pdf
    • https://guwubujurod.weebly.com/uploads/1/3/1/4/131438509/zikimofalojovizub.pdf
    • https://limikasideg.weebly.com/uploads/1/3/4/4/134446439/3893287.pdf
    • https://static.s123-cdn-static.com/uploads/4470027/normal_6003e75440705.pdf
    • https://cdn-cms.f-static.net/uploads/4470038/normal_5fe7836fbd157.pdf
    • https://cdn-cms.f-static.net/uploads/4404290/normal_601949507e556.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rufegojokod.epizy.com/die_aufklrung.pdf
    • https://uploads.strikinglycdn.com/files/78da622a-ad8f-48fc-9075-0bfb6e8593cb/fetabojil.pdf
    • http://tesapul.epizy.com/vidmate_hd_movie_er_apk.pdf
    • https://uploads.strikinglycdn.com/files/d94cc9f4-80e8-4e4d-92ad-fe3d39f7c542/93774650990.pdf
    • https://s3.amazonaws.com/pirofopafu/examples_of_introduction_for_report_writing.pdf
    • https://s3.amazonaws.com/gujutavevive/varunimanel.pdf
    • https://s3.amazonaws.com/luworizesupox/havoc_brothers_video_songs_3gp.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ca.bin
ebaacf77e7c961a3a41997328db98223b0901fa746be746d6471d7be19d8c440		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CA 5284 bytes
font_01_sfnt_off0000faa2.bin
8549de22bcf52a1ce7bb254b7cb8f794d7ed491b946e39366fefc0c8cf26caa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA2 10084 bytes

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