Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ff56e521efa5c6…

MALICIOUS

PDF

44.3 KB Created: 2020-04-09 12:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 5f43ba752a1e5ee8e9744e18e8205894 SHA-1: 61005153c98908726a5b84d6264f4af76512592a SHA-256: c7ff56e521efa5c64a88f50eca42c31cc93212e107fb8776e92852fc6363765b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links to various domains, indicating a link farm or redirection scheme. The primary URL, http://heathrowholdingsunlimited.com/uploads/1/3/0/4/130477135/130477135.html#configuracion+electronica+condensada+del+cadmio, appears to be the entry point for this network. The document body contains garbled text and metadata related to wkhtmltopdf, suggesting it was programmatically generated. 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://heathrowholdingsunlimited.com/uploads/1/3/0/4/130477135/130477135.html#configuracion+electronica+condensada+del+cadmio PDF link annotation
    • http://bibleinthepub.com/uploads/1/3/1/3/131382607/bebb943f53a8b1.pdfIn PDF document text
    • http://atxbotanicals.com/uploads/1/3/0/5/130541462/50200705b.pdfIn PDF document text
    • http://sbingman.com/uploads/1/3/1/0/131070940/53426d4e6f461aa.pdfIn PDF document text
    • http://hostmaster.teddybrighton.co.uk/uploads/1/3/0/8/130814416/7292662.pdfIn PDF document text
    • http://mendocinotoffeecompany.com/uploads/1/3/0/8/130814909/gavaxenowab.pdfIn PDF document text
    • http://handydavis.com/uploads/1/3/0/5/130551125/3fb1d11fc87.pdfIn PDF document text
    • http://nomnomgelato.com/uploads/1/3/0/3/130323573/nidedibivosed.pdfIn PDF document text
    • http://732snapdragonsavenue.com/uploads/1/3/0/4/130478160/5e2728614.pdfIn PDF document text
    • http://mrssouthernsclass.com/uploads/1/3/0/5/130539923/nemurifirulo.pdfIn PDF document text
    • http://ebmccallanbuildingltd.com/uploads/1/3/1/0/131071157/9941446.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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

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_off00006d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D17 8184 bytes
SHA-256: 92895877902bcd8936134c08e622fdf1678058cbcc5bcb8844e5ea43272e9fc6
font_01_sfnt_off00008af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF7 4144 bytes
SHA-256: 885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da
font_02_sfnt_off000097f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97F0 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea

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