Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b8dea42d219d0a…

MALICIOUS

PDF

68.2 KB Created: 2021-02-27 22:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 5eba4820c3066f80b36b432c552af35a SHA-1: fc5582362f6c44dd1a6c35c8404bc5ea93c122c0 SHA-256: e5b8dea42d219d0a5d6407f9b3c9170124a39b2d82f1b6b5f5333405273d5e77
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/award?keyword=how+to+troubleshoot+a+maytag+washer PDF link annotation
    • http://dilawiputonu.mypressonline.com/frosty_the_snowman_original_song_lyrics.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/departamento_de_educacion_especial_mipe.pdfIn PDF document text
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/1855478.pdfIn PDF document text
    • https://viwitilabepimep.weebly.com/uploads/1/3/2/6/132695477/705daa3e5e809a5.pdfIn PDF document text
    • https://peretokat.weebly.com/uploads/1/3/4/0/134040551/puzururesiwawo-dejar-lifitosad-zaruli.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/tanelowimemovix_kifen_lobupevi.pdfIn PDF document text
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/fewemitamixa.pdfIn PDF document text
    • http://igonlinesupport.com/fuwidokavupusedotolognriy.pdfIn PDF document text
    • http://fepotarugagi.22web.org/81861705108.pdfIn PDF document text
    • http://tur8osale.site/wiferiakhk2.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/30121936524.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maxegore.epizy.com/psychology_of_color_green.pdfIn PDF document text
    • http://derekage.epizy.com/46806717809.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_off0000d025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD025 5396 bytes
SHA-256: 974749ef42d02083c42df6cdd625e98a621d49675fb3fb3ca5801d209e28d719
font_01_sfnt_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 9768 bytes
SHA-256: b262aef5f8a91a0b5fef163b541697d4f1bd4eb06c505c4cbe797f12d5b26694

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