Malicious PDF — malware analysis report

Static analysis result for SHA-256 772fc4dd1d9779f0…

MALICIOUS

PDF

71.4 KB Created: 2021-02-13 05:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 555c104fa5115e935dede5359aa2265c SHA-1: 67db2c285a13e2965db8f26b19edc2365d2df353 SHA-256: 772fc4dd1d9779f0787b34d5da9efcd00887cd97d604ab647a8f4f43136c38f8
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with several pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags links to known malicious redirectors, suggesting the document is designed to lead users to harmful sites. No scripts were extracted, but the primary attack vector appears to be the extensive use of deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://yafferge.ru/wix?keyword=contract+law+multiple+choice+questions+and+answers+pdf In PDF document text
    • http://d-youtube.com/most_popular_tiktok_music_video_download5bqq2.pdfIn PDF document text
    • https://kesaroxet.weebly.com/uploads/1/3/0/7/130775747/betasawude-bikum-lizime-faxik.pdfIn PDF document text
    • http://ritikutoxukor.22web.org/lividul.pdfIn PDF document text
    • http://blue-tick-central.com/74126607768uj1ie.pdfIn PDF document text
    • http://tubudemawaxoki.iblogger.org/free_christmas_sheet_music_trumpet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_5fd20288018b3.pdfIn PDF document text
    • https://luvalebasewe.weebly.com/uploads/1/3/5/3/135326782/c2fec.pdfIn PDF document text
    • https://fojomuku.weebly.com/uploads/1/3/4/4/134447263/84bfbba15fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zumewozuzetarun.epizy.com/hollywood_bluray_movies_free_sites.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_off0000db78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB78 5516 bytes
SHA-256: 9c225bffff2482d21b663f368c6aa3cc73f42915c62fdc8c3eaaba0d6ad3b853
font_01_sfnt_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 10156 bytes
SHA-256: 3244a40944b0fecd59dcccb1abbb85c5bb1fb11b428b5e601ea157996490351b

Open this report in the interactive analyzer, or submit your own file for analysis.