Malicious PDF — malware analysis report

Static analysis result for SHA-256 465c25de30ec60df…

MALICIOUS

PDF

48.5 KB Created: 2020-05-22 05:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: bf8e0ede3e87e658cfc9ba566de073aa SHA-1: a7d1c57e1a072403e89058730d3ba51d12c1fd32 SHA-256: 465c25de30ec60df11a85ef3e3b89782653287a39e9b81d2f68b02ca3281653e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links to other PDF files hosted on various domains, indicating a potential SEO poisoning or link farm attack. The document body contains obfuscated text and references to 'N64 dd emulator' and 'wkhtmltopdf', suggesting a lure or a method to disguise the malicious intent. The primary attack pattern involves redirecting users to a network of external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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 http://nbzdht.bdgct.com/uploads/1/3/1/4/131438092/131438092.html#n64+dd+emulator PDF link annotation
    • http://karleykolors.org/uploads/1/3/0/6/130621552/d96925.pdfIn PDF document text
    • http://calm2you.com/uploads/1/3/1/3/131383592/6886578.pdfIn PDF document text
    • http://avaceleste.net/uploads/1/3/0/9/130969242/9b23931aaa8d.pdfIn PDF document text
    • http://allthingsyoga.net/uploads/1/3/1/4/131452923/julizezudeto_kowerobavogovu_winibaroveve.pdfIn PDF document text
    • http://emmarainc.com/uploads/1/3/0/8/130814328/b7cd8.pdfIn PDF document text
    • http://haconcrete.com/uploads/1/3/1/4/131455734/7ace7718bdbf4f.pdfIn PDF document text
    • http://gaithersburgcarpetcleaning.biz/uploads/1/3/1/4/131437693/9418673.pdfIn PDF document text
    • http://tusclasesdepoker.com/uploads/1/3/0/2/130291572/funogori-febidolexegojet.pdfIn PDF document text
    • http://idoweddingplanning.ca/uploads/1/3/0/7/130775108/8373558.pdfIn PDF document text
    • http://dubldcontracting.com/uploads/1/3/0/6/130640123/736d687.pdfIn PDF document text
    • http://fivehonet.com/uploads/1/3/0/4/130436389/4928531.pdfIn PDF document text
    • http://madisongahaferart.org/uploads/1/3/0/6/130605388/020ca616a557a.pdfIn PDF document text
    • http://noraelliottcostner.com/uploads/1/3/0/4/130488067/rujejurodorofad_baxetilotokin.pdfIn PDF document text
    • http://birthreadyspokane.com/uploads/1/3/1/4/131406291/7469fb5f8e.pdfIn PDF document text
    • http://padovecote.com/uploads/1/3/0/5/130589295/limafezosizetes.pdfIn PDF document text
    • http://pipes-underground.com/uploads/1/3/0/2/130270918/f16b3d3b0.pdfIn PDF document text
    • http://henchmenglass.ca/uploads/1/3/0/6/130604744/3fcf97.pdfIn PDF document text
    • http://ymphotog.com/uploads/1/3/1/3/131380915/xawuza-sekuje-mesezen.pdfIn PDF document text
    • http://psychological.coach/uploads/1/3/0/3/130313155/rofejilanuzupuj.pdfIn PDF document text
    • http://suzettebanzo.com/uploads/1/3/1/8/131856166/levolil.pdfIn PDF document text
    • http://funlearninguniverse.com/uploads/1/3/0/3/130379147/bed166c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F7 11148 bytes
SHA-256: e9ef31eb444e4ad45c17547f56cb264b32db61bda68ef7af53af80749ab7de37

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