Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7e6e38886e518a…

MALICIOUS

PDF

41.1 KB Created: 2020-05-23 23:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 5ff422d63f2056c5ef2c17dac038d0ca SHA-1: ee9310d9667f97848551316487f44dcac3da7225 SHA-256: bf7e6e38886e518ae8bd8a7c795ce143e3bb2ec6cea480d4dd621a90b4e0be28
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The embedded URLs and the document body content, though partially corrupted, reinforce the presence of these external links. No scripts were extracted from this sample.

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://playalosarcospvspanish.devsite-1.com/uploads/1/3/0/4/130489359/130489359.html#panasonic+th+50+pz85u PDF link annotation
    • http://beyondthedunescottage.ca/uploads/1/3/0/8/130814052/bosogofabadu.pdfIn PDF document text
    • http://yogawjamie.com/uploads/1/3/1/4/131453674/13391b26eac.pdfIn PDF document text
    • http://laughterpieces.com/uploads/1/3/1/4/131409264/sixuronufegukusuri.pdfIn PDF document text
    • http://unikwities.com/uploads/1/3/1/3/131383482/d421f1e80.pdfIn PDF document text
    • http://instruction4commoncore.com/uploads/1/3/0/4/130477719/2cb857d5b4.pdfIn PDF document text
    • http://femniqe.shop/uploads/1/3/0/7/130775698/pakevumaxof.pdfIn PDF document text
    • http://honeybees-online.com/uploads/1/3/0/6/130639554/bezujoj_tiditev_tivofevofarupi.pdfIn PDF document text
    • http://idealrustics.com/uploads/1/3/1/6/131637306/7607244.pdfIn PDF document text
    • http://socialdogretreat.com/uploads/1/3/0/5/130542770/7920830.pdfIn PDF document text
    • http://valentinesbanquet.com/uploads/1/3/0/7/130775917/708a267006fe.pdfIn PDF document text
    • http://bitcoin-gold.gr/uploads/1/3/1/3/131380021/5a79115937705.pdfIn PDF document text
    • http://spotontherapycenter.com/uploads/1/3/1/3/131398009/pinaguk.pdfIn PDF document text
    • http://revfritzhudson.com/uploads/1/3/1/8/131857243/bebowan-lusunedewizix.pdfIn PDF document text
    • http://thesweettealady.com/uploads/1/3/0/7/130739371/1953527.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_off00007417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 11108 bytes
SHA-256: ec356f8925e1e7f7a1b6e1efc9fb626a99c0ec97aa80a77188ecc6f5daa88129