Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd39cce7dbd6a0b0…

MALICIOUS

PDF

39.7 KB Created: 2020-06-06 05:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 48bb405ba18fe9a55687ac02ee5c6e89 SHA-1: c15790ecdf301aa4740109c74e5cbda5d9597db4 SHA-256: cd39cce7dbd6a0b02df1b3be85a120fbcbc1698bffb3bfdce3bbc62f7df13f89
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating a link farm or SEO spamming operation. The document body, though partially corrupted, contains text related to 'pipefitter books free download' and the authoring application, suggesting a lure to external content. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a malicious link distribution tactic.

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.muebleriatorres.net/uploads/1/3/0/6/130604958/130604958.html#pipefitter+books+free+download PDF link annotation
    • http://sacredcreationsdaycare.com/uploads/1/3/1/8/131871499/lamonugip.pdfIn PDF document text
    • http://cookeryacademy.net/uploads/1/3/0/8/130814001/kokoxafoxe.pdfIn PDF document text
    • http://en.concordiaball.at/uploads/1/3/0/6/130639797/2eac92.pdfIn PDF document text
    • http://dwell.ardeasanctuary.com/uploads/1/3/0/8/130814258/jotebubowag-xapogafuvug-fupodukotolo-pozifefuj.pdfIn PDF document text
    • http://nicedeal4you.com/uploads/1/3/1/0/131071137/7637118.pdfIn PDF document text
    • http://virtualfunk.net/uploads/1/3/0/5/130589384/9028163.pdfIn PDF document text
    • http://kidsnurseryart.co.uk/uploads/1/3/0/7/130740572/3419042.pdfIn PDF document text
    • http://angie.cleangreenhomesllc.com/uploads/1/3/0/4/130483512/busakirumego_zazajaf_rigegafusiz_mupal.pdfIn PDF document text
    • http://80at294.com/uploads/1/3/0/7/130739596/d4084def23.pdfIn PDF document text
    • http://pacificperformancecoaching.com/uploads/1/3/0/3/130323249/53e0812b334d4b.pdfIn PDF document text
    • http://webdisk.muebleriatorres.net/uploads/1/3/0/6/130604958/terms.htmlIn PDF document text
    • http://webdisk.muebleriatorres.net/uploads/1/3/0/6/130604958/dmca.htmlIn PDF document text
    • http://webdisk.muebleriatorres.net/uploads/1/3/0/6/130604958/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://pakavekum.files.wordpress.com/2020/06/salozogefelozunaz.pdfIn PDF document text
    • https://tijupogekipo.files.wordpress.com/2020/06/ferugedalipobimoxekekoge.pdfIn PDF document text
    • https://togifiviliv.files.wordpress.com/2020/06/51030802569.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

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_off000056e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E6 10260 bytes
SHA-256: 27a0a2d603e72b03a87c4a2828628540c2edb5b3dc33305d1fa44bdf1ba6309a
font_01_sfnt_off00007a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 7396 bytes
SHA-256: a5d147d7bd18b26503d3c33574dd58c1a712efa6c18964afd118098ab6d59f3e

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