Malicious PDF — malware analysis report

Static analysis result for SHA-256 003dbf5d220e4852…

MALICIOUS

PDF

77.1 KB Created: 2021-02-23 17:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ce2feb90b08ba66ce180c08326653e23 SHA-1: 50080d3c503599df090b93009aecb73d6cc5d819 SHA-256: 003dbf5d220e485238cd68f7595139579aaf38385e06398e69db91f1997467b1
186 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to a link farm, suggesting a phishing or SEO poisoning attack. The primary URL points to a search query for 'Lenovo thinkpad t430 factory reset', likely a lure to attract users. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are hosted on disposable domains, further supporting the malicious intent. ClamAV detection confirms the presence of malware.

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://bologen.ru/wb?keyword=lenovo%20thinkpad%20t430%20factory%20reset PDF link annotation
    • https://lovelutunaguj.weebly.com/uploads/1/3/4/7/134735325/4051970.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/b9e8522.pdfIn PDF document text
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/1351311.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/zemuru.pdfIn PDF document text
    • https://demimawuna.weebly.com/uploads/1/3/5/3/135389973/gatufukadezupikelulu.pdfIn PDF document text
    • https://wexapifunoru.weebly.com/uploads/1/3/4/7/134715363/witimebiwezajuvo.pdfIn PDF document text
    • https://tovakuroxi.weebly.com/uploads/1/3/1/1/131164121/liratamagew-dagesovakubotan-dobugubes.pdfIn PDF document text
    • https://gorasanoso.weebly.com/uploads/1/3/1/8/131859135/fidavavosut.pdfIn PDF document text
    • https://luresigixake.weebly.com/uploads/1/3/5/2/135294948/movejelir.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/4de832b5d9fd58.pdfIn PDF document text
    • https://zibekasosux.weebly.com/uploads/1/3/4/0/134040395/mafivonorixi.pdfIn PDF document text
    • https://dujezokedibu.weebly.com/uploads/1/3/4/3/134392169/5956696.pdfIn PDF document text
    • http://wiinorama.space/how_to_reopen_closed_windowhmah2.pdfIn PDF document text
    • https://murozukuzofapu.weebly.com/uploads/1/3/4/7/134716639/zuvudekejupa.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/notalewerumavaz.pdfIn PDF document text
    • https://tagasudinabasow.weebly.com/uploads/1/3/5/3/135325797/zesaki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://denawovusu.rf.gd/anaconda_snake_photo.pdfIn PDF document text
    • http://balazetesu.epizy.com/model_vendor_esp8266mod_datasheet.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_off0000ef9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9E 5772 bytes
SHA-256: ec6927d77f6389fe6e2d5625725edbbc92152ada1e3eaab09dea2f2d3992ae69
font_01_sfnt_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 10600 bytes
SHA-256: 3d9dc7cd678032be120fb754d224f783c15105b479466a02df2e5f208ee672ed

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