Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd6416e04065ed3…

MALICIOUS

PDF

40.2 KB Created: 2020-03-30 11:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4625d986a3020a474ec2e256e9a76a03 SHA-1: 86c49029029afab825ce328f1e36496d5dc4c632 SHA-256: ddd6416e04065ed30bf27ea35c34c730e520986e6c8438d2f847e2e316a179d4
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 on various domains. This technique is often used for SEO poisoning or to distribute malicious content indirectly. No scripts were extracted, and the document body is largely unreadable, but the heuristic firings strongly indicate a link farm intended to direct users to external resources. The primary IOCs are the numerous URLs embedded within the document.

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://misssoutheastpageantry.us/uploads/1/3/0/3/130313539/130313539.html#valor+absoluto+de+funciones+racionales PDF link annotation
    • http://sonship.uk/uploads/1/3/0/5/130539311/7478869.pdfIn PDF document text
    • http://shearstyle.net/uploads/1/3/1/0/131071277/juwusemir.pdfIn PDF document text
    • http://wwidbq.com/uploads/1/3/0/2/130272291/febba99c33a5e.pdfIn PDF document text
    • http://shilpimahajan.com/uploads/1/3/0/2/130271243/firag_kunov_ruxalajonupupa.pdfIn PDF document text
    • http://womantowomaninc.ca/uploads/1/3/1/1/131164398/56dbff72.pdfIn PDF document text
    • http://themaidstonemarch.com/uploads/1/3/0/5/130590325/perisud-dorinuzutegok-barudir-toxirafi.pdfIn PDF document text
    • http://navinamisir.com/uploads/1/3/0/5/130588880/4425796.pdfIn PDF document text
    • http://itsdelishandmore.com/uploads/1/3/0/5/130539734/romubar_zefadulesufop.pdfIn PDF document text
    • http://raychavez.net/uploads/1/3/0/4/130476208/2126809.pdfIn PDF document text
    • http://rachaellust.com/uploads/1/3/0/6/130603803/lazop.pdfIn PDF document text
    • http://callawaymedia.net/uploads/1/3/0/5/130539437/3fb7e.pdfIn PDF document text
    • http://tpf-c.com/uploads/1/3/0/5/130545745/442a9f3fda1.pdfIn PDF document text
    • http://enchantinglittleminds.com/uploads/1/3/0/2/130289345/dazupigiwezager_lemotijuw.pdfIn PDF document text
    • http://saltsandsunshine.net/uploads/1/3/0/6/130603769/sorikemakezutunino.pdfIn PDF document text
    • http://hostmaster.brandinsight.nl/uploads/1/3/0/7/130775968/c2a1cf6a2.pdfIn PDF document text
    • http://michellejfernandez.com/uploads/1/3/1/3/131378776/9900863.pdfIn PDF document text
    • http://mail.aylinsezer.com/uploads/1/3/1/4/131437061/disorikigo_pasimalobefuteg_fonirelega.pdfIn PDF document text
    • http://baccha.org/uploads/1/3/0/8/130814177/fecd5.pdfIn PDF document text
    • http://baynesco.com/uploads/1/3/0/3/130379370/9ad45bb456a7.pdfIn PDF document text
    • http://ulrichthy.com/uploads/1/3/0/5/130543168/rozajikeka.pdfIn PDF document text
    • http://roguefacultypress.org/uploads/1/3/0/5/130539697/a6e58acb1.pdfIn PDF document text
    • http://thecameracat.com/uploads/1/3/0/5/130543052/24fa6.pdfIn PDF document text
    • http://shaunandteoni.com/uploads/1/3/0/7/130775293/fokelo_fotixelivame_gadukovefevad.pdfIn PDF document text
    • http://nolawrecordz.com/uploads/1/3/0/7/130740374/pimibazawojurufogedi.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 1

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_off000073d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D5 7940 bytes
SHA-256: 49cd3ad77870d75d804a72a3b5d81c6514d74413a34340bc5120f1dedd00d03f

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