Malicious PDF — malware analysis report

Static analysis result for SHA-256 512d3830c3b6fd90…

MALICIOUS

PDF

35.8 KB Created: 2020-05-18 07:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: cf5555f8ec23b16aa1cefd0aff316f06 SHA-1: 0981c1875206085a47da7cbb9547cfc1a71c4f32 SHA-256: 512d3830c3b6fd9031a897013cdad55f3f3941ecb2a27f03c8ce21e7263d3f99
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, indicative of a link farm or SEO spamming technique. The document body, though heavily obfuscated, contains URLs that are likely intended to redirect users to malicious websites or download further payloads. The presence of numerous PDF links suggests an attempt to manipulate search engine rankings or distribute malware through a network of compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://mychoicemedicalpractice.com/uploads/1/3/0/4/130483572/130483572.html#kannada+feeling+songs+whatsapp+status+video PDF link annotation
    • http://e-hookahusa.com/uploads/1/3/0/6/130604108/6801699.pdfIn PDF document text
    • http://aw11source.com/uploads/1/3/1/4/131483293/3751816.pdfIn PDF document text
    • http://billy-nelson.com/uploads/1/3/0/7/130738846/9862393.pdfIn PDF document text
    • http://jaimoda.net/uploads/1/3/0/6/130604382/17acc50a01e.pdfIn PDF document text
    • http://finalmemoriesmatter.com/uploads/1/3/1/4/131437420/9ef1ce9.pdfIn PDF document text
    • http://citytocountry.ca/uploads/1/3/0/7/130776322/2547133.pdfIn PDF document text
    • http://televerge.com/uploads/1/3/0/6/130620470/temuxakikake.pdfIn PDF document text
    • http://luminarydistillery.com/uploads/1/3/1/8/131856270/f5a76d.pdfIn PDF document text
    • http://east2westmedicine.com/uploads/1/3/0/3/130313632/vudawobifare.pdfIn PDF document text
    • http://msportsix.com/uploads/1/3/0/6/130639513/76245ec051.pdfIn PDF document text
    • http://adoptadapt.com/uploads/1/3/0/5/130590058/bitelodelatola.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FF 9992 bytes
SHA-256: d17f1e5305834608f3da0ddb3b7c797b09552780f8c38169edc07240d60b704d