Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d37244727acfbe…

MALICIOUS

PDF

69.8 KB Created: 2021-02-23 20:33:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 73830a15aec30ce2ea1acf585f12499b SHA-1: e088d21e4365b65f7bad7ae82f2cbf933435f12c SHA-256: 49d37244727acfbef2c7d476c04b8b2192f5141fec5b9934b4d52d1266202266
196 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/wix?keyword=little+creek+british+labs PDF link annotation
    • http://bubiwikozexamo.iblogger.org/63559666375.pdfIn PDF document text
    • https://mazazujusuvazix.weebly.com/uploads/1/3/1/8/131856432/5690919.pdfIn PDF document text
    • https://jevogebog.weebly.com/uploads/1/3/2/3/132303093/1208786.pdfIn PDF document text
    • https://mofugitapab.weebly.com/uploads/1/3/4/7/134728490/7312858.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/igOTdgf/37367062476.pdfIn PDF document text
    • https://tudevapibor.weebly.com/uploads/1/3/4/8/134884273/1232911.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/18401017627.pdfIn PDF document text
    • https://xelegiri.weebly.com/uploads/1/3/4/4/134435730/84f0ec.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/Ijb3FqG/principles_of_management_clep_study_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fexuror/pewedajowurowetamub.pdfIn PDF document text
    • http://rukotig.rf.gd/lutenabefiwomizudeko.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/batman_arkham_origins_apk_data_compressed.pdfIn PDF document text
    • http://galopaxuvubopuj.rf.gd/katukaxabusunim.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/character_design_quarterly_1.pdfIn PDF document text
    • http://zasizuv.rf.gd/56365410838.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/tozenewegonopesenarodul.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/48566368166.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_off0000d73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73E 5032 bytes
SHA-256: 3a36057061f6daefe81e8e07eb79f89e3a4483b7b9ed966b55f4f7fcf9a5afa1
font_01_sfnt_off0000e856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE856 9952 bytes
SHA-256: 27a694dc513b2d0eb6c5381e3272006ff0d1bf274b9713ea575843887be9c627