Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b0aa49c2f10028…

MALICIOUS

PDF

66.9 KB Created: 2020-03-10 05:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: b445783304c6dc557383eb114fbd7510 SHA-1: 9287c522494d32dce8a12f4b675bcfcbc99e25a3 SHA-256: 80b0aa49c2f1002856295b440d381214e7778ca57002e0a3bd3b4b009ec353f8
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a tactic to manipulate search engine results or redirect users to potentially malicious sites. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URLs are the primary indicators of malicious intent, likely serving as a distribution point for further compromise.

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://webdisk.jessicamiyuki.com/uploads/1/3/0/6/130621210/130621210.html#international+phonetic+alphabet+vowels+and+consonants+chart PDF link annotation
    • http://kristenskakes.com/uploads/1/3/0/2/130271161/d637f.pdfIn PDF document text
    • http://splitnest.com/uploads/1/3/0/5/130589137/9358907.pdfIn PDF document text
    • http://appstoreus.com/uploads/1/3/0/6/130640074/kojodosilonodafi.pdfIn PDF document text
    • http://badjeeps.net/uploads/1/3/0/7/130738554/nopito_xusexivopatake_xopojijo.pdfIn PDF document text
    • http://localzaa.com/uploads/1/3/0/6/130621786/3454619.pdfIn PDF document text
    • http://nathanbohachvibes.com/uploads/1/3/0/8/130814966/7409025.pdfIn PDF document text
    • http://shellkriterion.com/uploads/1/3/0/6/130604658/6371666.pdfIn PDF document text
    • http://gartnergolden.com/uploads/1/3/0/5/130543050/9963388.pdfIn PDF document text
    • http://redeeminghope.net/uploads/1/3/0/3/130379115/bb7c7ec.pdfIn PDF document text
    • http://mta-sts.leggsmanufacturing.com/uploads/1/3/0/7/130775982/21c8ce12d46c884.pdfIn PDF document text
    • http://hostmaster.chinahollandtravel.com/uploads/1/3/0/5/130539735/a72c9ffc.pdfIn PDF document text
    • http://distribuidoramaissaude.com/uploads/1/3/0/8/130814290/fujumutilis.pdfIn PDF document text
    • http://shoptheclubhouse.com/uploads/1/3/0/4/130490476/2433027.pdfIn PDF document text
    • http://adoxian.com/uploads/1/3/0/8/130813395/19d508.pdfIn PDF document text
    • http://mojovideo.net/uploads/1/3/0/6/130639283/6659766.pdfIn PDF document text
    • http://rhythmjackson.com/uploads/1/3/0/7/130775295/6a3f1c2f09b8d.pdfIn PDF document text
    • http://mysteriesnghostsefiction.com/uploads/1/3/0/2/130289399/9a586f7e64221f7.pdfIn PDF document text
    • http://www.goldkeycars.com/uploads/1/3/0/5/130542872/jirivesipo.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://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D48 9684 bytes
SHA-256: 8be141e6a1334ec12d4fd1a02b846e24fc47dd687ada5fecc8b986146f7eab96
font_01_sfnt_off0000c0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DA 3368 bytes
SHA-256: ce6da8a3bd83e920e8b1a07ed48eaf043be4c87cc7a7a3d168601ce7985e3e3a
font_02_sfnt_off0000ccbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBB 24832 bytes
SHA-256: 1867c1a4ec9359dcc7b7cfd01dc145d400a4e3c9b2bee82f96c14c705449e56a

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