Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ffe9f87b2263140…

MALICIOUS

PDF

40.5 KB Created: 2020-03-16 01:18:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 08d751aa42e4cb8ca0e026c41abe5b0c SHA-1: d2481b0548411766f097e0ab36b70910333ed736 SHA-256: 4ffe9f87b2263140bc9b38f4c3f9e28c4338707bc89168e3987fd31e6cae2ea9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The document body, though partially corrupted, contains a URL that aligns with the link farm behavior. This suggests the primary purpose is to act as a link farm, potentially for SEO manipulation or to distribute further malicious content via the linked PDFs.

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://visionlinkshotelapartments3.devsite-1.com/uploads/1/3/0/8/130874128/130874128.html#active+and+passive+imperative+sentences+worksheets PDF link annotation
    • http://letsclarify.com/uploads/1/3/0/3/130313150/2754061.pdfIn PDF document text
    • http://mta-sts.mail.ahoradubai.com/uploads/1/3/0/2/130273962/1ab34db5fcc890.pdfIn PDF document text
    • http://mta-sts.mx.jpmartist.com/uploads/1/3/0/3/130379894/6470628.pdfIn PDF document text
    • http://mail.chrisbikes.co.uk/uploads/1/3/0/6/130639990/fetemu.pdfIn PDF document text
    • http://webdisk.delaneydrywall.com/uploads/1/3/0/6/130621946/f27f6803.pdfIn PDF document text
    • http://mustangtrucktiresupplier.com/uploads/1/3/0/2/130271259/a86acf75577.pdfIn PDF document text
    • http://my-zaps.com/uploads/1/3/0/5/130590521/4725562.pdfIn PDF document text
    • http://rellbuchanan1.com/uploads/1/3/0/6/130621741/1024815.pdfIn PDF document text
    • http://luxvendee.com/uploads/1/3/0/8/130813646/raguvomuvijilo.pdfIn PDF document text
    • http://www.iancpark.com/uploads/1/3/0/6/130603815/24b665b2.pdfIn PDF document text
    • http://platinumprinting.net/uploads/1/3/0/4/130436182/xubarimumo.pdfIn PDF document text
    • http://www.vickidabney.com/uploads/1/3/0/5/130539097/1d2c4d699928765.pdfIn PDF document text
    • http://dautantplusbyannetellier.com/uploads/1/3/1/0/131070457/rabaduj.pdfIn PDF document text
    • http://rebeccalmontgomery.net/uploads/1/3/0/5/130550955/4935908.pdfIn PDF document text
    • http://warmanddryuk.com/uploads/1/3/0/3/130323588/796cdbaf0e22fb.pdfIn PDF document text
    • http://aoentlifestyle.com/uploads/1/3/0/5/130550665/viluvuza-kabidoferenesuw-xakajozipulawi.pdfIn PDF document text
    • http://test.fuertefitness.com/uploads/1/3/0/5/130539354/debezipukade_belekeloniwez_jafojisixoti.pdfIn PDF document text
    • http://idahohay.org/uploads/1/3/0/3/130323703/3560925.pdfIn PDF document text
    • http://sonicsustenance.com/uploads/1/3/0/4/130476469/7c932a68.pdfIn PDF document text
    • http://mail.lighthouse.group/uploads/1/3/0/6/130620429/5ddc614a7be5f.pdfIn PDF document text
    • http://anatomyinks.com/uploads/1/3/0/7/130775016/d4718e9c3846.pdfIn PDF document text
    • http://leannegilardi.com/uploads/1/3/0/5/130539316/mojuwokebe-zesesonowusofo-loxuwonifezu.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 2

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_off000076a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A9 7460 bytes
SHA-256: bf27fbe7379f68e336c5a825188cf6eacaf1dc889470535a8f3aa3451246bf41

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