Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b86e30c0962f678…

MALICIOUS

PDF

41.0 KB Created: 2020-03-29 14:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 66cebeb087a176cb02e31de17d4cc8b0 SHA-1: 8021d9fe151d2de1908658a9e570dc32f0bb5da8 SHA-256: 9b86e30c0962f678bdc04f16590fc305121a2d9a0b42e28f102ff446484c0cca
96 Risk Score

Malware Insights

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

This PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body itself is largely garbled but contains a reference to a scientific topic, likely a lure. The primary function appears to be directing users to a large collection of other PDF files hosted on various domains, potentially for SEO spam or to distribute further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://nordiceugenics.com/uploads/1/3/0/5/130539403/130539403.html#main+difference+between+divergent+evolution+and+convergent+evolution PDF link annotation
    • http://momhustleology.com/uploads/1/3/0/7/130739072/pojikuwuve_tadiji.pdfIn PDF document text
    • http://50referralsin50states.com/uploads/1/3/0/5/130551140/zojodib.pdfIn PDF document text
    • http://takingcareyoga.com/uploads/1/3/0/7/130775985/jazuxipasovanakag.pdfIn PDF document text
    • http://envirocleaningservice.net/uploads/1/3/0/2/130272420/bidalanujik.pdfIn PDF document text
    • http://deck-hands.com/uploads/1/3/0/6/130603828/mezijifogijol.pdfIn PDF document text
    • http://webmail.carnielittlefield.com/uploads/1/3/0/7/130740389/sovasafebum.pdfIn PDF document text
    • http://contact.wildlifepestsolutions.com/uploads/1/3/0/9/130969535/dccdd.pdfIn PDF document text
    • http://nimbus-realty.com/uploads/1/3/0/5/130542853/1dd319f5.pdfIn PDF document text
    • http://masterscalcutta.com/uploads/1/3/0/4/130479123/dojuzugob.pdfIn PDF document text
    • http://savonbotanique.com/uploads/1/3/0/7/130775558/nekovulikoforijosiv.pdfIn PDF document text
    • http://germanautowerksatl.com/uploads/1/3/0/5/130543402/fagimosanezot.pdfIn PDF document text
    • http://bjocconsulting.com/uploads/1/3/0/6/130604026/votojava-difiwokazid.pdfIn PDF document text
    • http://timothyafenner.com/uploads/1/3/0/7/130776120/2017147.pdfIn PDF document text
    • http://onpointmedicalrecruiting.com/uploads/1/3/0/8/130874125/xitarovaretefigepe.pdfIn PDF document text
    • http://kksolutions.info/uploads/1/3/0/6/130639177/035ed3f.pdfIn PDF document text
    • http://westsidemedical.org/uploads/1/3/1/4/131407767/8027236.pdfIn PDF document text
    • http://yurfamily.com/uploads/1/3/0/3/130313193/f848879559e7c.pdfIn PDF document text
    • http://travelauste.com/uploads/1/3/0/2/130287279/8737207.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
🗂 Part of campaign: annotalegal.com 4 samples

Related samples 2

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_off000077f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F7 7632 bytes
SHA-256: 1fc8aa4e9a52f0cc575121a9466ed4c5a969eaa5eabf99a325e1a2194e950f92

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