Malicious PDF — malware analysis report

Static analysis result for SHA-256 459e05883dff758f…

MALICIOUS

PDF

92.1 KB Created: 2021-02-15 06:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: be57101e592925bf04463c53e13788d9 SHA-1: 0d062d98a812287eb9346210718e544a4eedc9b8 SHA-256: 459e05883dff758faaca5584633a04655ba4f1c4c52d370298ed2dfa3e385aed
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains or potentially malicious services, suggesting an attempt to redirect users to phishing or malware hosting sites. The PDF structure and embedded links are indicative of a phishing or content-luring attack.

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://druttle.ru/wb?keyword=grinding%20guide%20vanilla%20wow%20horde PDF link annotation
    • http://sberbank.services/nadan_pattukal_malayalam_mp3_free_download33br2.pdfIn PDF document text
    • http://ru-order-687646765445.art/jovilelegedenuzesurigikafs41o.pdfIn PDF document text
    • http://hustlinmoney.com/zixidezolifezgzj8m.pdfIn PDF document text
    • http://prizinsta24.site/audi_s5_wikijmp80.pdfIn PDF document text
    • http://vknart.xyz/google_play_store_dark_mode_apkx20vh.pdfIn PDF document text
    • http://100naturals.fun/among_us_minecraft_skin_novawyh3m.pdfIn PDF document text
    • http://fitnesspack.net/275980013921rzxt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gobipubefosoja.epizy.com/61035635780.pdfIn PDF document text
    • http://nusavigosewu.epizy.com/95987338423.pdfIn PDF document text
    • http://xigoraviwa.epizy.com/bussid_kerala_oneness.pdfIn PDF document text
    • http://dojeranorered.epizy.com/ginapefoledujofuvef.pdfIn PDF document text
    • http://tamazodatitemi.epizy.com/html_code_formatter_atom.pdfIn PDF document text
    • http://rututovabin.rf.gd/gijitunefategozevofokit.pdfIn PDF document text
    • http://xipijokezi.rf.gd/libaxaxedofawozaginuvuli.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_off00012d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D09 5092 bytes
SHA-256: 721606cfa486d56456dfee32e9be1b05df08eb0801656a8e843b2f16cb0f6e1b
font_01_sfnt_off00013e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6C 10792 bytes
SHA-256: 8e8a59db6a349abe32e5b6816490e3b5eb0b1da2f66605468180994cbe3f6d5a

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