Malicious PDF — malware analysis report

Static analysis result for SHA-256 5821a9091315051b…

MALICIOUS

PDF

41.0 KB Created: 2020-03-29 10:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 897cc4cd3a86f0b905f58a47c8f20721 SHA-1: cee0d7cd4cfef4d8ed2d41ae2b9d7d90b13a0839 SHA-256: 5821a9091315051bd25a6124ff6a06639ab9cae56e48f1e5ff34ac333f0f41d4
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted across numerous domains. This pattern is indicative of a link farm or SEO spam campaign, potentially used to distribute malware or phish for credentials. The document body itself contains metadata related to its creation, but the primary malicious activity is the mass of embedded URLs.

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://gclub.lucky1st.com/uploads/1/3/1/3/131383532/131383532.html#fujifilm+finepix+xp120+review PDF link annotation
    • http://namastamyoga.com/uploads/1/3/0/6/130604470/xejizufodenim-kiruzesa.pdfIn PDF document text
    • http://www.teamjayray.com/uploads/1/3/0/9/130969717/rufixeke.pdfIn PDF document text
    • http://thewebbargain.com/uploads/1/3/0/7/130739495/supoba_wijavijebolat.pdfIn PDF document text
    • http://fretbuzz.info/uploads/1/3/0/3/130312986/47189e586d55.pdfIn PDF document text
    • http://pitkulup.net/uploads/1/3/0/6/130604934/7367123.pdfIn PDF document text
    • http://dcciinspections.com/uploads/1/3/0/8/130813478/xanak.pdfIn PDF document text
    • http://magi-online.com/uploads/1/3/0/8/130813835/a91e08b4.pdfIn PDF document text
    • http://papomundo.org/uploads/1/3/0/4/130483924/3136523.pdfIn PDF document text
    • http://buysomepixels.com/uploads/1/3/1/3/131380011/navekunafakiwisivos.pdfIn PDF document text
    • http://mycecilialopez.com/uploads/1/3/0/7/130739864/b2ffb806a.pdfIn PDF document text
    • http://gwwatersolutions.com/uploads/1/3/0/2/130288534/b0b3c4e493.pdfIn PDF document text
    • http://root.huxfordpoleandtimber.com/uploads/1/3/0/4/130476791/4402241.pdfIn PDF document text
    • http://planethealingfilms.com/uploads/1/3/1/1/131163853/5ac9487.pdfIn PDF document text
    • http://www.circarenovationsny.com/uploads/1/3/0/4/130476203/3882fb849f.pdfIn PDF document text
    • http://doonardmanor.com/uploads/1/3/0/5/130589064/bibat_tupuxujevid_fiditu_gewele.pdfIn PDF document text
    • http://makemoneystreaming.com/uploads/1/3/0/4/130436197/21d991fc.pdfIn PDF document text
    • http://rgsquared.com/uploads/1/3/0/2/130287929/583673.pdfIn PDF document text
    • http://jonkuhnglass.art/uploads/1/3/0/4/130489253/263761.pdfIn PDF document text
    • http://fisherparris.com/uploads/1/3/0/5/130588805/nosijawapidul-rawijuzez.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

Related samples 5

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_off0000770f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770F 7652 bytes
SHA-256: 6d1a7c9de7c153b2bd660f1eced52b3b0e3c3d4dba142a2b1629e7da158afef6

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