Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e238082398a879c…

MALICIOUS

PDF

81.3 KB Created: 2020-05-15 10:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 6e355a3d4d0c114e63e9d60c902f280d SHA-1: 0052173f8564ff3d55f8b9bc0c2da992314f77ec SHA-256: 9e238082398a879c56a8a4f129815c23f97b478f0551fcb52d239cba1ac020ad
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, also contains references to these URLs. This suggests a tactic to drive traffic to numerous websites, potentially for SEO manipulation or to serve as a distribution point for further malicious payloads. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://evanttx.org/uploads/1/3/0/4/130476699/130476699.html#ethiopian+agricultural+research+institute+pdf PDF link annotation
    • http://bogolist.com/uploads/1/3/0/6/130604281/tisefavikigu.pdfIn PDF document text
    • http://tuabogadopr.com/uploads/1/3/0/2/130287997/e37dc75.pdfIn PDF document text
    • http://agro-spezial.com/uploads/1/3/0/4/130483761/73f8d065997cb.pdfIn PDF document text
    • http://konradragnarsson.com/uploads/1/3/0/2/130271244/3332f9a38.pdfIn PDF document text
    • http://houseofcaduceus.com/uploads/1/3/0/6/130621909/3334839.pdfIn PDF document text
    • http://thecustardman.com/uploads/1/3/0/4/130435884/4729aaba0165.pdfIn PDF document text
    • http://mamas-amorepasta.com/uploads/1/3/0/2/130291433/suzilunupa-wumanuvemo-pemujadutusujil-todotopixalom.pdfIn PDF document text
    • http://forbeselderlaw.com/uploads/1/3/0/7/130775876/raxuvofap.pdfIn PDF document text
    • http://k-pages.de/uploads/1/3/0/7/130739983/3b1ebbf.pdfIn PDF document text
    • http://randomfandombags.com/uploads/1/3/0/6/130639960/7445388.pdfIn PDF document text
    • http://sahalla.com/uploads/1/3/1/4/131452825/kiludesikuta.pdfIn PDF document text
    • http://intelligence-economique-alsace.com/uploads/1/3/0/5/130545636/dituba.pdfIn PDF document text
    • http://meganwinsormusic.com/uploads/1/3/1/0/131070972/a7da207e8fbe8.pdfIn PDF document text
    • http://bike14.com/uploads/1/3/0/6/130620443/2494302.pdfIn PDF document text
    • http://hrpropertyrestoration.com/uploads/1/3/0/6/130621776/radijutujiwefe-boxogetede-medevobi-wibumajosuwix.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4A 62608 bytes
SHA-256: 3de0d819621c2cad8f287b185eb1595b3e5b7f2c387312e323b8152b82426eb2
font_01_sfnt_off00011899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11899 9888 bytes
SHA-256: efd6b7bcbe61b299246311f6389a73cb853d696b6436dcfe62e040cc52b7e5e9

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